Hardware and Network Troubleshooting

After a power outage, a desktop computer will not power on. The PSU fan does not spin, and no LEDs are lit. The technician tests the power supply with a PSU tester; all voltages are within spec. A multimeter reading at the motherboard's power button header shows 3.3V when the button is pressed. The power supply is also confirmed to work when tested in another system. What is the most likely cause?

A network printer is set to a static IP address. Users report that print jobs spool on their workstations but never print. The technician confirms the printer is powered on, the network cable is connected, and the printer's self-test page prints successfully. The technician can ping the printer's IP address from a workstation. Which of the following is the MOST likely cause of the issue?

A user reports that after moving their desktop computer to a new desk, the network connection no longer works. The technician notices that the Ethernet cable is plugged into the computer and the wall jack, but the link lights on the computer's NIC and the wall jack are off. The cable is a flat-style Cat5e cable that came with the computer. Which of the following is the most likely cause?

A network laser printer displays 'Replace imaging drum' on its control panel. The technician installs a new imaging drum, but the next day the message reappears and users report faded prints. Which of the following is the most likely cause?

A user reports that their desktop computer can connect to the local network and access shared folders, but cannot browse the internet. Other computers on the same network work fine. The technician checks the IP configuration and sees the computer has a valid IP address of 192.168.1.100 with a default gateway of 192.168.1.1. The computer can successfully ping 192.168.1.1 and 8.8.8.8, but cannot ping 'google.com'. Which of the following should the technician check FIRST?

A user reports that their desktop computer intermittently loses network connectivity. The computer uses a USB Wi-Fi adapter. The technician notices that the adapter feels warm during use and the connection drops most often when the computer has been running for a while. Other devices on the same wireless network work fine. Which of the following is the MOST likely cause of the issue?

A user reports that their laptop's external monitor connected via HDMI is not detected. The technician tested the external monitor with another laptop and it works. The laptop's built-in display functions normally. Which of the following should the technician try NEXT?

A technician is troubleshooting a desktop computer that cannot connect to the internet. The computer has a static IP address of 192.168.1.100 with a subnet mask of 255.255.255.0 and a default gateway of 192.168.1.1. The technician can ping 127.0.0.1 successfully but cannot ping 192.168.1.1. The link lights on the NIC and the switch port are solid. Which of the following should the technician check NEXT?

A technician is troubleshooting a desktop computer that will not boot. The CPU cooler fan spins, but the graphics card (GPU) fan is not spinning, and there is no display on the monitor. The power supply was tested in another system and works. Which of the following is the MOST likely cause?

A technician is troubleshooting a network laser printer that prints blank pages even though the toner cartridge is new and properly installed. The printer's self-test page also comes out blank. Which of the following should the technician check first?

A user reports that a laser printer is printing vertical blank lines on every page. The toner cartridge is new and properly installed. Which of the following should the technician check FIRST?

A user's desktop computer does not boot and emits a series of long beeps. After checking the motherboard documentation, the technician confirms the beep code indicates a memory issue. Which of the following should the technician do FIRST?

A user reports that their desktop computer shuts down unexpectedly after about 30 minutes of use. The technician reads CPU temperature sensors in BIOS and sees the CPU idles at 45°C but quickly rises to 95°C under load before the system shuts down. The heatsink fan is spinning. Which of the following is the most likely cause?

A network technician is troubleshooting a network laser printer that is intermittently dropping off the network. The printer has a static IP address of 192.168.1.50. The technician can sometimes ping the printer, but often the ping times out. The printer's network configuration page shows it is connected at 100 Mbps, half-duplex. The switch port to which the printer is connected supports up to 1000 Mbps and is set to auto-negotiate. Which of the following is the MOST likely cause of the intermittent connectivity?

A laser printer is printing pages with dark vertical streaks. The technician replaces the toner cartridge and the imaging drum, but the streaks persist. Which of the following components should the technician check NEXT?

A technician is troubleshooting a desktop computer that randomly freezes and then reboots. The technician runs a CPU stress test; after about 5 minutes, the system freezes and reboots. The CPU temperature during the test is monitored and never exceeds 75°C. The technician has run a full memory test (MemTest86) and a hard drive diagnostic (SMART check); both pass without errors. The power supply voltages are within specifications when measured with a multimeter at idle and under load. Which of the following is the MOST likely cause of the issue?

A network laser printer is printing pages with garbled characters and random symbols. The technician prints a test page from the printer's control panel, which prints correctly. The technician then prints from a different computer on the same network, and the printout is also garbled. The printer driver has been reinstalled. Which of the following should the technician check NEXT?

A technician is troubleshooting a desktop computer that powers on (fans spin, lights turn on) but the monitor displays 'No Signal'. The technician has already verified that the monitor works on another computer and has reseated the RAM and the discrete GPU. The motherboard has integrated graphics. Which of the following should the technician do NEXT?

A technician is troubleshooting a laser printer that produces pages with faint images. The toner cartridge is full and the imaging drum has been replaced recently. The technician prints a test page from the printer's control panel, which also appears faint. Which of the following components should the technician check or replace NEXT?

A user reports that their desktop computer loses network connectivity intermittently. The technician finds that the RJ45 connector on the cable has a broken retention clip, but replacing the cable does not resolve the issue. The computer is connected to a wall jack in the office. The technician uses a cable tester on the wall jack and discovers that pins 4 and 5 are open (no continuity). Which of the following is the MOST likely cause of the intermittent connectivity?

A network laser printer prints garbled pages when receiving print jobs from one specific user's computer, but prints correctly from all other computers on the same network. The printer has a static IP address and is connected via an unmanaged switch. The technician can ping the printer from the affected computer without any packet loss. Which of the following is the MOST likely cause?

A user reports that their desktop computer frequently loses network connectivity for a few seconds, then reconnects. The technician replaces the Ethernet cable and the wall jack, but the problem persists. The computer is connected to a managed switch. The technician checks the switch logs and sees no errors or discards. Which of the following should the technician check NEXT?

A user reports that their desktop computer, connected to a network printer via Ethernet, outputs garbled text when printing. The same user can print correctly using a USB connection to the same printer. Other users on the same network can print to the printer normally. The technician has already reinstalled the printer driver on the user's computer. Which of the following should the technician check NEXT?

A technician is troubleshooting a laser printer that produces pages with vertical white streaks running down the page. The toner cartridge has been replaced with a new OEM cartridge, and the imaging drum assembly is clean and appears undamaged. The technician prints a test page from the printer's control panel, and the white streaks are still present. Which of the following components is MOST likely causing this issue?

A technician is troubleshooting a laser printer that produces pages with vertical white streaks. The toner cartridge has been replaced with a new OEM cartridge, and the imaging drum is clean. A test page printed from the printer's control panel also shows the streaks. Which of the following components is MOST likely causing the issue?

A user reports that their network printer shows 'Offline' in the print queue on their Windows computer. The printer is powered on and has a link light on its network port. Other users on the same network can print to the printer without issue. Which of the following should the technician do FIRST?

A technician is troubleshooting a laser printer that produces pages with vertical black streaks down the length of each page. The technician has already replaced the toner cartridge and the imaging drum with new OEM parts. A test page printed from the printer's control panel also shows the streaks. Which of the following printer components is MOST likely causing this issue?

A user reports that their desktop computer runs for about ten minutes, then suddenly shuts down without warning. After a few minutes, it can be restarted, but the same problem occurs. The technician suspects overheating. Which of the following should the technician check FIRST?

A network printer shows 'Offline' in the print queue on a user's Windows computer. The printer is powered on, has a link light on its network port, and other users on the same network can print to it without issues. The technician has already verified that the printer is online from its control panel. Which of the following should the technician do FIRST to resolve the issue?

A user reports that their desktop computer can connect to the internet but cannot access a specific internal website hosted on a server with IP 192.168.1.200. Other users in the same office can access the website normally. The technician pings the server IP from the affected computer and gets a successful reply. Which of the following should the technician check NEXT?

A technician is troubleshooting a laser printer that produces pages where the toner smudges easily and can be wiped off with a finger. The technician has already replaced the toner cartridge with a new OEM cartridge, but the problem persists. Which of the following printer components is MOST likely causing this issue?

A laser printer produces light ghost images of previously printed text on the following page. The technician has already replaced the toner cartridge and the imaging drum with new OEM components. The fuser appears to be heating properly. Which of the following is the NEXT component the technician should inspect or replace?

A user reports that their desktop computer loses network connection intermittently. The technician notices that the LED on the NIC is off but other computers on the same switch work fine. The cable run is long, passing through a ceiling. Which tool should the technician use FIRST?

A laser printer produces pages where the toner smudges easily when rubbed. The technician has already replaced the toner cartridge and the imaging drum with new OEM components. The fuser is heating to the correct temperature during operation. Which of the following printer components is MOST likely causing this issue?

A user reports that their desktop computer cannot access the internet, but it can access internal network resources and other computers on the local network. The technician runs ipconfig and sees the IP address is 169.254.15.22. Which of the following is the MOST likely cause of this issue?

A user reports that their desktop computer shuts down randomly after running for about 30 minutes. The technician suspects overheating. The technician checks the CPU temperature in BIOS and sees 45°C at idle. The computer has a stock CPU cooler, and the case has one intake and one exhaust fan. The technician runs a stress test, and the CPU temperature reaches 95°C within 5 minutes, then the system shuts down. The technician has already cleaned all dust from the heatsink and fans. Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop computer that powers on, but the system emits three long beeps and does not display anything on the monitor. The technician has already reseated the RAM modules in their original slots. Which of the following should the technician do NEXT?

A technician builds a new PC. When powering on, all fans spin and LEDs light, but the monitor shows 'No Signal'. The motherboard has a CPU diagnostic LED that remains lit. The technician has already reseated the RAM and GPU, and verified the monitor and cable are functional. Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop computer that powers on for about one second and then shuts down. The technician has already removed all expansion cards and disconnected all drives. The system still exhibits the same behavior with only the CPU, motherboard, one RAM stick, and power supply connected. Which of the following is the MOST likely cause?

A user reports that printed pages from a laser printer contain vertical black streaks. The streaks appear in the same location on every page. The technician has already replaced the toner cartridge and the imaging drum with new OEM components. Which of the following printer components should the technician inspect NEXT?

A technician is troubleshooting a desktop computer that shuts down unexpectedly after about 10 minutes of playing a graphics-intensive game. The technician checks the CPU temperature, which stays at 45°C at idle but reaches 95°C under load just before shutdown. The heatsink and fan are clean and spinning properly. The power supply is a 650W unit, and the graphics card is a high-end model that draws up to 350W. Which of the following is the MOST likely cause of the shutdowns?

A network technician is troubleshooting inter-VLAN routing. Clients on VLAN 10 (192.168.10.0/24) cannot communicate with servers on VLAN 20 (192.168.20.0/24). The router has subinterfaces configured for both VLANs and an ACL that permits all traffic between them. The router connects to a Layer 2 switch via a single cable. The switch port connecting to the router is configured as an access port in VLAN 10. Which of the following is the MOST likely cause of the communication failure?

A technician is troubleshooting a laser printer that produces pages with a vertical black streak that repeats every 2 inches down the page. The technician has already replaced the toner cartridge and the imaging drum with brand-new OEM components. The streak appears in the same location on every page. Which of the following printer components should the technician inspect or replace NEXT?

A user reports that their desktop computer intermittently loses network connectivity for a few seconds at a time. The technician observes that the link light on the NIC turns off briefly and then back on. The technician has already replaced the Ethernet cable and the switch port. The issue persists. Which of the following should the technician check NEXT?

A technician is troubleshooting a laser printer that produces pages with a faint, blurry image on one side of the page (right edge). The problem occurs on every print job and the print quality is otherwise normal. The technician has already replaced the toner cartridge and the imaging drum, but the issue persists. Which of the following printer components is the MOST likely cause of this problem?

A technician is troubleshooting a laser printer that produces pages with a horizontal black line across the top of every page. The line is the same width as the page and appears in the same location each time. The technician has already replaced the toner cartridge and the imaging drum. Which of the following printer components should the technician check NEXT?

A technician is troubleshooting a desktop computer that powers on, all fans spin, and the keyboard and mouse receive power, but nothing is displayed on the monitor. The monitor's power LED is solid green, and the video cable is securely connected to the integrated graphics port. The technician has already reseated the RAM and tested with known-good RAM. The motherboard has no diagnostic LEDs or speaker. Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop computer that powers on, all fans spin, and the keyboard lights flash, but the monitor displays 'No Signal'. The monitor and video cable are known to work with another computer. The technician has already reseated the RAM and tested with known-good RAM. The motherboard has no diagnostic LEDs or speaker. Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop computer that randomly restarts under heavy load, such as during video rendering. Temperature monitoring shows CPU and GPU temperatures are within normal ranges. The power supply unit (PSU) fan is spinning, but the technician suspects power delivery issues. Which tool should the technician use to directly test the PSU's voltage outputs?

A user reports that their wired desktop computer intermittently loses network connectivity. The technician checks the Ethernet cable and observes that it is not securely clicked into the NIC port. The cable appears undamaged and the connector is intact. Which of the following is the MOST likely cause of the intermittent connectivity?

A user reports that a laser printer is displaying a 'Paper Jam' error even though no paper is visibly jammed inside the printer. The technician has removed all paper trays and checked the fuser area, rollers, and output bin, but finds no crumpled or stuck paper. Which of the following is the MOST likely cause of this error?

A user reports that they can ping other computers on the network by IP address and can access the internet, but they cannot access any shared folders or network printers on the local network. The user's IP configuration is correct and the network cable is securely connected. Which of the following should the technician check FIRST?

A technician is troubleshooting a desktop computer that intermittently loses network connectivity for several minutes at a time. During the outage, the link light on the NIC remains on and flickers. The technician has already replaced the Ethernet cable and the NIC. The computer is connected to a managed switch port configured for auto-negotiation. Which of the following should the technician check NEXT?

A technician is troubleshooting a laser printer that is printing blank pages. The toner cartridge is new and installed correctly. The printer performs its startup cycle normally. Which of the following components should the technician check NEXT?

A technician is troubleshooting a user's wired desktop that intermittently loses network connectivity for short periods (1-2 minutes) several times a day. During the outage, the link light on the NIC remains lit and continuous. The technician has already replaced the Ethernet cable and the NIC. The switch port is configured for auto-negotiation. Which of the following should the technician check NEXT?

A user reports that their desktop computer is experiencing slow network speeds, especially when transferring large files to a server on the same local network. The user's computer and the server are both connected to a managed gigabit switch. The user's NIC and the server NIC are both gigabit capable. The technician checks the switch port configuration and sees that the port for the user's computer is set to speed 1000 and duplex full. The user's computer shows a link speed of 100 Mbps and half duplex in the operating system. Which of the following is the MOST likely cause?

A technician is troubleshooting a desktop computer that periodically loses network connectivity for about one minute at a time. The link light on the NIC remains lit during the outage. The technician has replaced the Ethernet cable and the NIC with known-good parts, but the issue persists. The computer is connected to a managed switch. Which of the following should the technician check NEXT?

A user reports that their desktop computer frequently freezes and becomes unresponsive during video editing sessions. The technician runs diagnostic software and notices that the CPU temperature reaches 95°C (203°F) under load. The CPU is an Intel Core i7 with a stock cooler. The case has adequate ventilation. Which of the following should the technician do FIRST?

A user reports that their desktop computer loses network connectivity for several seconds whenever they open a large file transfer program. The technician checks the NIC properties and sees that the link speed is 100 Mbps, but the switch port is configured for 1000 Mbps (full duplex). The cable is a Cat5e cable that runs through the ceiling. Other computers in the same office have gigabit connections to the same switch. Which of the following is the MOST likely cause of the intermittent connectivity?

A technician configures a server with a static IP address of 192.168.1.100, subnet mask 255.255.0.0, and default gateway 192.168.1.1. The server can access the internet and devices on the 192.168.1.0/24 network. However, it cannot reach a network printer at 192.168.2.50. The printer is on the same physical LAN but in a different subnet (192.168.2.0/24). The router's interface for the 192.168.2.0 network is 192.168.1.2, and routing is properly configured. Other devices on the 192.168.1.0/24 network (with correct subnet mask 255.255.255.0) can reach the printer successfully. Which of the following is the MOST likely cause of the server's inability to reach the printer?

A technician is troubleshooting a user's wired desktop that can access local network shares and printers but cannot reach any internet websites. The technician pings the default gateway successfully. Which of the following is the most likely cause of this issue?

A technician is troubleshooting a server that unexpectedly shut down. The server has redundant power supplies, and the building power is stable. The technician checks the BIOS event log and finds a thermal warning before shutdown. The server is in a rack with other servers, all within temperature range. Which of the following is the most likely cause?

A technician is troubleshooting a workstation that shuts down randomly after running for 20-30 minutes. The technician has reseated the RAM modules, confirmed the power supply voltages are within specification using a multimeter, and verified that all case fans are spinning. The system has a dedicated graphics card. Which of the following should the technician do NEXT to diagnose the issue?

A user reports that they cannot access the internet. The technician checks the network status on the computer and sees that the Ethernet cable is plugged in, but the link light on the network interface card is not illuminated. Which of the following should the technician check FIRST?

A user reports that their desktop computer shuts down randomly after about 10 minutes of use. The technician checks the event log and sees thermal warnings. The technician has verified that all fans are spinning and the CPU heatsink is properly attached. Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop computer that randomly shuts down after about 20 minutes of use. The technician checks the event log and finds a critical thermal event. The technician verifies that both the CPU fan and case fans are spinning, and the CPU heatsink is securely attached. Which of the following should the technician do NEXT?

A user reports that their laptop’s Wi-Fi connection is slow and drops frequently, but only when they are in the break room. Other laptops in the same area have no issues. The technician tests the signal strength in the break room and it is excellent. Which of the following is the most likely cause?

A small office has a file server that is a virtual machine running on a Type 1 hypervisor. Users report intermittent connectivity to the file server. The technician has already verified the following: the physical network cables are intact, the switch ports are configured correctly, the host server's physical NICs are operating, and the VM's operating system shows no errors. The technician notices that the file server experiences brief packet loss when communicating with other VMs on the same host, but not when communicating with physical workstations. Which of the following should the technician investigate next?

A user reports that their desktop computer shuts down randomly after about 15 minutes of use. A technician checks the event log and finds a critical error related to a thermal event. The technician has verified that the CPU heatsink fan and all case fans are spinning, and the heatsink is securely attached. However, the computer still shuts down. Which of the following should the technician do NEXT?

A user reports that their laptop's Wi-Fi connection is unreliable and frequently drops. A technician checks Device Manager on the laptop and sees that the wireless adapter is listed with a yellow exclamation mark. Which of the following should the technician do FIRST?

A user reports that their laptop's Wi-Fi connection drops frequently, especially when the laptop is running on battery power. The technician checks Device Manager and sees the following setting enabled for the wireless adapter: 'Allow the computer to turn off this device to save power'. Which of the following is the MOST likely solution?

A technician is troubleshooting a desktop computer that randomly powers off. The event log shows a critical error: Kernel-Power 41. The power supply unit (PSU) fan is spinning, and the CPU cooler fan is also spinning. All cables appear connected. Which of the following should the technician do NEXT?

A desktop computer will not power on. The technician presses the power button, but there are no signs of activity—no fans, no LEDs. The power supply unit (PSU) is securely connected and the wall outlet is working. The technician uses a multimeter to check the PSU's main power connector. The technician finds that the green wire (PS_ON) goes low (0V) when the power button is pressed, indicating the motherboard is sending the signal to turn on. However, no other pins on the main connector show any voltage, and the PSU fan does not spin. Which of the following is the most likely cause?

A technician is troubleshooting a desktop computer that consistently shuts down after approximately 30 minutes of normal operation. The technician has already replaced the power supply unit and cleaned the CPU heatsink of dust. The CPU temperatures in the BIOS are normal (35°C idle). After the shutdown, the event log shows a 'Kernel-Power 41' critical error. The technician reseated all power cables and checked for loose connections. Which of the following should the technician check NEXT?

A user reports that their desktop computer powers on but the monitor shows no display. The technician has already verified the monitor works with another computer, the video cable is securely connected, and the computer's internal fans spin. The computer has a dedicated graphics card and the monitor is connected to the motherboard's video port. Which of the following should the technician do NEXT?

A desktop computer shuts down unexpectedly after running for about 20 minutes. The technician has already verified that the CPU temperature is normal (35°C idle), replaced the thermal paste, confirmed all fans are spinning, and tested the power supply with a multimeter (all voltages within specification). The system still shuts down. Which of the following should the technician check NEXT?

A network technician changes the company's subnet mask from 255.255.255.0 to 255.255.0.0 to accommodate network growth. All workstations use DHCP except one file server that has a static IP address of 192.168.1.50 with subnet mask 255.255.255.0 and default gateway 192.168.1.1. After the change, a user reports that they cannot access the file server. The user's workstation obtains its IP via DHCP and can access the internet. Which of the following is the most likely cause of the issue?

A technician installs a new graphics card in a desktop computer. The computer powers on, all fans spin, and the motherboard's POST LED sequence completes, but there is no image on the monitor. The monitor is connected to the new graphics card via DisplayPort and has been verified to work with another computer. Which of the following should the technician do FIRST?

A user reports that their desktop computer's built-in Ethernet port is not working. The link light on the computer's NIC is off, and the user cannot connect to the network. The technician has verified that the Ethernet cable and switch port work with another computer. Which of the following should the technician check NEXT?

A technician is troubleshooting a desktop computer that experiences intermittent freezing, especially when running graphics-intensive applications or games. The technician has updated all drivers, run full antivirus scans, and replaced the RAM. The CPU and GPU temperatures stay below 70°C under load. The event logs show no critical errors. However, the freezing always occurs under high load, and sometimes the system restarts without a blue screen. Which component is MOST likely failing?

A technician is troubleshooting a laptop that will not power on. The power adapter's LED is lit when plugged into the wall, but pressing the laptop's power button yields no response—no fans, no LEDs, and no beeps. The technician has already removed the battery and held the power button for 30 seconds to drain residual charge. Which of the following should the technician try NEXT?

A technician is troubleshooting a desktop computer that powers on (fans spin, LEDs light) but the monitor displays 'No Signal'. The technician has already verified the monitor works with another computer, the video cable is connected to the dedicated graphics card, and the dedicated graphics card is properly seated. The motherboard has both onboard and dedicated graphics. The technician attempts to boot using the onboard graphics by removing the dedicated card, but the monitor still shows 'No Signal'. The motherboard's diagnostic LED display shows code 'd6', which the manual indicates means 'No Console Output Devices are found'. Which of the following should the technician do NEXT?

A user reports that their desktop workstation loses network connectivity intermittently, often occurring when the user bumps the desk or moves the Ethernet cable. The link light on the NIC sometimes flickers and occasionally turns off for a few seconds during these events. The technician has already replaced the Ethernet cable with a known-good one and tested a different port on the same switch; the problem persists. Which of the following is the MOST likely cause of the issue?

A technician is troubleshooting a desktop computer that failed to boot after a lightning storm. The computer powers on (fans spin, LEDs light) but there is no POST and no beep codes. The technician has already tried a different monitor, reseated all RAM and expansion cards, and tested the power supply with a multimeter (all voltages within spec). Which of the following should the technician check NEXT?

A desktop computer powers on for about two seconds (fans spin, LEDs flash) then immediately shuts down. It repeats this cycle if the power button is pressed again. The technician has already replaced the power supply with a known-good unit, removed and reseated all expansion cards and memory modules, and tested the system outside the case on a non-conductive surface. The problem persists. Which of the following is the MOST likely cause?

A user reports that their desktop computer can ping other workstations on the local network and can connect to the internet by IP address (e.g., pinging 8.8.8.8 works), but cannot browse any websites using domain names. The network settings show the workstation obtains an IP address automatically via DHCP. The technician checks the DHCP server and confirms it is providing a valid DNS server address. Which of the following is the MOST likely cause?

A technician is troubleshooting a workstation that experiences slow file transfers and occasional timeouts on the local network. The workstation is connected to a managed switch via a Cat5e cable. The technician checks the switch port configuration and finds it is set to 'auto-negotiate'. The workstation's network adapter properties show it is manually configured to '100 Mbps Full Duplex'. Other workstations on the same switch do not experience these issues. Which of the following is the MOST likely cause of the problem?

A technician installs a new CPU on a compatible motherboard. After applying thermal paste and installing the cooler, the system powers on but immediately shuts down after about 3 seconds. The technician verifies that the CPU fan is spinning and that the power supply is adequate. The motherboard's diagnostic LEDs show no errors before shutdown. Which of the following is the MOST likely cause?

A technician is troubleshooting a desktop workstation that can successfully ping other local devices and the default gateway by IP address, but cannot access any websites when browsing with a web browser. The workstation obtains its IP configuration automatically via DHCP. The technician confirms that the DHCP server is providing a valid DNS server address and that other workstations on the same network can browse the internet normally. Which of the following is the MOST likely cause of the issue?

A workstation is unable to connect to the internet. The technician runs the 'ipconfig' command and sees the IPv4 address is 169.254.15.200 with a subnet mask of 255.255.0.0. The workstation can ping other devices on the local subnet but cannot ping the default gateway or any external addresses. Which TWO actions should the technician take to resolve this issue? (Select two.)

A user reports that their desktop computer will not boot after a power surge. When the power button is pressed, the case power LED lights up, fans spin for about two seconds, and then everything stops. There are no beep codes and no display. The technician has tested the power supply with a multimeter and confirmed that all voltages are within specification. The motherboard shows no signs of physical damage or bulging capacitors. Which component should the technician test or replace NEXT?

A technician is troubleshooting a desktop computer that powers on but displays nothing on the screen. The technician hears two short beeps from the motherboard speaker and then silence. The CPU fan spins, and the power LED is on. Based on the beep code (two short beeps) typical of AMI/BIOS, which component is most likely faulty?

A technician is troubleshooting a workstation that loses network connectivity intermittently, specifically when the user runs CPU-intensive applications like video rendering. The link light on the network interface card (NIC) turns off during these episodes. The technician has already replaced the Ethernet cable with a known-good cable and switched the workstation to a different port on the same switch, but the problem persists. The same port and cable work fine when tested with a laptop. The workstation has a recently installed high-end graphics card and a 400W power supply that came with the case. Which of the following is the MOST likely cause?

A user reports that their desktop computer intermittently loses network connectivity, especially when the nearby office printer starts printing. The link light on the NIC occasionally turns off during these events. The Ethernet cable runs near a fluorescent light fixture and a power cable. The technician has already replaced the Ethernet cable with a known-good Cat6 shielded cable, but the issue persists. Which of the following should the technician do NEXT?

A technician installed a used SATA SSD from another computer into a desktop workstation. The BIOS correctly detects the SSD, but Windows does not show any new drive in File Explorer. The technician opens Disk Management and sees no uninitialized disks listed. Which of the following should the technician check NEXT?

A user reports that their desktop computer shuts down unexpectedly while running video editing software, usually after about 15 minutes of heavy rendering. The technician has observed that the CPU fan and case fans spin at high speed just before the shutdown. The technician cleaned all dust from the heatsink and case intakes, but the problem persists. The BIOS reports CPU idle temperature at 35°C (95°F). Which of the following should the technician do NEXT?

A user reports that their desktop computer intermittently loses network connectivity when the overhead fluorescent lights in the office are turned on. The link light on the network interface card (NIC) turns off during these events. The technician replaced the existing unshielded twisted pair (UTP) Cat5e cable with a shielded Cat6 cable, but the problem continues. Which of the following should the technician do NEXT to resolve the issue?

A technician is troubleshooting a workstation in a small office that loses network connectivity sporadically. The technician notices that the problem occurs every time a nearby heavy-duty laser printer starts a print job. The workstation is connected to the same network switch as the printer but is on a different electrical circuit. The technician has already replaced the Ethernet patch cable and verified the workstation’s network settings are correct. The link light on the workstation’s NIC turns off during the outages. Which of the following should the technician check NEXT?

A user reports that their desktop computer shuts down unexpectedly when running resource-intensive applications like video editing. The technician has cleaned the dust from the heatsink and fans, verified that all fans are spinning, and monitored temperatures. The BIOS reports CPU temperature as 35°C idle and 70°C under load, which are within normal specifications. The system has a dedicated graphics card that requires a 6-pin PCIe power connector, and the power supply is a 450W unit that came with the computer case. Which of the following is the MOST likely cause?

A technician is troubleshooting a desktop computer in a manufacturing facility. The computer loses network connectivity whenever a nearby floor buffer (motor) is turned on. The link light on the NIC turns off during these events. The technician has already replaced the Ethernet cable with a shielded Cat6 cable and moved the computer to a different electrical circuit. The problem persists. Which of the following should the technician do NEXT?

A technician is troubleshooting a workstation that has intermittent network connectivity. The link light on the NIC flashes on and off irregularly. The workstation is connected to a 1 Gbps switch port. The technician runs a loopback test on the NIC, which passes. The cable is a known-good Cat6 cable. The technician checks the switch port configuration and finds it is hard-coded to 100 Mbps full duplex. The workstation NIC is set to auto-negotiate. Which of the following is the MOST likely cause of the issue?

A user reports that they cannot print to a network printer. Other users on the same network can print to this printer successfully. The technician verifies that the workstation can ping the printer by IP address. The technician checks the print queue on the workstation and sees the job stuck with a 'Spooling' status. Which of the following should the technician do FIRST?

A technician is troubleshooting a desktop computer in a machine shop. The computer experiences intermittent network connectivity loss, specifically when a large electric motor on a nearby lathe is started. The link light on the network interface card (NIC) turns off during these events. The technician has already replaced the Ethernet cable with a shielded Cat6a cable and moved the computer to a different electrical circuit on a different breaker panel. The problem persists. Which of the following should the technician do NEXT?

A user reports that their desktop computer's monitor displays a 'No Signal' message. The computer's power LED is lit, and all fans are spinning. The technician has verified that the monitor power is on and that the HDMI cable is securely connected to both the monitor and the computer. The technician also tried a different monitor, which also shows 'No Signal'. Which of the following should the technician do NEXT?

A technician updated the BIOS on a desktop computer to resolve a compatibility issue with a new GPU. After the update, the computer will not boot. The CPU fan spins, the power LED is lit, but there are no POST beeps and no display output. The technician has already removed the CMOS battery for five minutes and reinstalled it, but the problem persists. The motherboard has a USB BIOS Flashback port and a dedicated Flashback button on the rear I/O panel. Which of the following should the technician do NEXT?

A user reports that their desktop computer shuts down unexpectedly when running video editing software. The technician has already verified that CPU and GPU temperatures are within normal limits under load, the power supply unit is 650W and should be adequate, and all fans are spinning. The system has been stable for two years prior to this issue. Which of the following should the technician check NEXT as the MOST likely cause?

A technician is troubleshooting a desktop computer that fails to boot after a power surge during a thunderstorm. The computer's power LED illuminates briefly when the power button is pressed, but then nothing happens. The technician has tested the power supply with a multimeter and it outputs correct voltages. Which of the following components is MOST likely damaged?

A technician is troubleshooting a desktop computer that will not power on. The motherboard's standby power LED is lit, indicating that the power supply is receiving AC power. When the technician presses the front panel power button, nothing happens. The technician has already tested the power supply by jumping the green wire to a black wire on the 24-pin connector, and the power supply fan spins. Which of the following is the MOST likely faulty component?

A user reports that their wired desktop computer loses network connectivity intermittently. The technician notices that the link light on the network interface card (NIC) turns off when the computer's CPU is under heavy load, such as during video rendering. The technician has already updated the network driver and replaced the Ethernet cable with a known-good cable. The switch port is active and works with other devices. Which of the following is the MOST likely cause of this issue?

A technician is troubleshooting a desktop computer that shuts down unexpectedly when the user runs a 3D rendering application. The technician has already replaced the power supply unit (PSU) with a known-good unit of the same wattage, verified that all cooling fans are working, and checked that CPU and GPU temperatures remain within normal limits during the rendering process. The RAM passes a memory test. Which of the following should the technician check NEXT?

A user reports that their desktop computer loses network connectivity for a few seconds whenever they start a large video rendering application. The technician has already updated the network adapter driver, replaced the Ethernet cable, and verified that the switch port is not faulty. The computer uses an integrated NIC on the motherboard. The system's CPU and GPU temperatures are within normal limits during rendering. Which of the following is the MOST likely cause of the intermittent network drops?

A technician notices a constant high-pitched whine coming from the power supply area of a desktop computer. The computer boots and operates normally under all workloads. The technician has already checked that all fans are free of obstructions and that no cables are touching the fan blades. Which of the following components is most likely causing the noise?

A user reports that their wired desktop computer loses network connectivity for a few seconds at random times. The technician observes that when the issue occurs, the network activity LED on the integrated NIC turns off. The technician has already replaced the Ethernet cable, tested the switch port with another device (which works fine), and updated the NIC driver. Which of the following should the technician check NEXT?

A technician is troubleshooting a desktop computer that was recently moved to a new location. The computer powers on and all fans spin, but the monitor remains black and the POST speaker emits a pattern of one long beep followed by two short beeps. The technician has already reseated the graphics card and the RAM modules. Which of the following should the technician check NEXT?

A technician is troubleshooting a workstation that intermittently loses network connectivity. The workstation has an integrated Gigabit Ethernet NIC. During an outage, the technician checks the network adapter status in the operating system and sees 'Network cable unplugged' even though the cable is securely connected to both the workstation and the switch. The technician has already replaced the Ethernet cable, the switch port, and the NIC driver. The issue occurs more frequently when the workstation's power supply is under heavy load (e.g., during gaming). Which of the following is the MOST likely cause?

A technician is troubleshooting a workstation that loses network connectivity for a few seconds at random intervals. The technician observes that during the outage, the network icon in the system tray shows 'Unidentified network' or 'No internet access', but the IP configuration still shows a valid address from DHCP. The technician has already replaced the NIC and the Ethernet cable. Which of the following should the technician check NEXT?

A user reports that their desktop computer randomly restarts during gaming sessions. The technician has replaced the power supply unit (PSU) with a known-good unit of higher wattage, verified that CPU and GPU temperatures remain within normal limits during gaming, and updated all drivers. The RAM passes a memory test. Which of the following should the technician check NEXT?

A user reports that their desktop computer loses network connectivity for a few seconds every time they operate a large power tool (e.g., an electric saw) in the same room. The technician has already replaced the Ethernet cable, tested the switch port with another device (which works fine), and updated the NIC driver. Which of the following is the MOST likely cause of the intermittent disconnects?

A technician is troubleshooting a user's desktop computer that intermittently loses network connectivity. The issue occurs only when the building's central air conditioning (HVAC) system turns on. The technician has already replaced the Ethernet cable, the NIC (network interface card), and the switch port. The computer is connected to a surge protector and the power cabling is properly routed. Which of the following is the MOST likely cause of the intermittent connectivity?

A technician is troubleshooting a desktop computer that loses network connectivity for a few seconds every time the building's elevator motor starts. The technician has already replaced the Ethernet cable, the NIC, and tested the switch port with another device (which works fine). The computer is connected to a surge protector. Which of the following should the technician do NEXT?

A user reports intermittent network connectivity on a desktop computer. The technician observes that the Ethernet link light on the NIC turns off for a few seconds and then turns back on. The cable passes a wiremap test, the switch port is verified good with another device, and the NIC driver is updated. The issue occurs more frequently when the computer's case fan runs at high speed. Which of the following is the MOST likely cause?

A technician is troubleshooting a desktop computer that fails to boot and displays the error message 'Boot device not found'. The technician has verified that the hard drive is detected in the BIOS and that the boot order is set correctly. The hard drive is spinning and appears to be receiving power. Which of the following is the MOST likely cause of this issue?

A technician is troubleshooting a server that randomly shuts down after running for about 30 minutes. The server has dual power supplies and is connected to a UPS. The technician has already replaced the CPU cooler and verified that all fans are spinning. The temperature readings for the CPU and motherboard are within normal range. Which component should the technician check NEXT?

A technician is troubleshooting a desktop computer that connects to the network but experiences slow data transfers. The network uses a Gigabit Ethernet switch. The technician checks the network adapter status and sees that the link speed is 100 Mbps. The cable connecting the computer to the wall jack is a Cat5 cable. Which of the following is the MOST likely cause of the reduced speed?

A technician is troubleshooting a high-end gaming desktop that randomly restarts under heavy GPU load. The technician has already replaced the power supply with a unit that provides sufficient wattage, verified that CPU and GPU temperatures are within normal limits, and tested the RAM with a memory diagnostic (no errors). The GPU is a high-end model that requires two 8-pin PCIe power connectors. Which of the following is the MOST likely remaining cause of the random restarts?

A user reports that their laptop loses network connectivity whenever they unplug the AC power adapter. When running on battery power alone, the laptop's Wi-Fi works intermittently or disconnects. The technician has verified that the Wi-Fi adapter driver is up to date and that the router is functioning correctly. Which of the following should the technician do NEXT to resolve this issue?

A desktop computer will not boot. When the power button is pressed, the power LED lights up briefly and then turns off. The technician suspects a possible short circuit. Which of the following is the BEST first step to isolate the issue?

A technician is troubleshooting a workstation that randomly reboots when the user performs disk-intensive operations, such as copying large files. The technician has replaced the power supply and tested the RAM (no errors). The hard drive passes S.M.A.R.T. tests. The motherboard capacitors appear normal. The technician suspects a thermal issue but CPU and GPU temps are normal. Which component should the technician check next?

A user reports that their desktop computer cannot access any network shares. Other computers on the same switch can access the shares. The technician runs ipconfig /all on the affected computer and sees the following: IPv4 Address: 169.254.13.42, Subnet Mask: 255.255.0.0, Default Gateway: blank. Which of the following is the MOST likely cause?

A technician is troubleshooting a desktop PC that powers on (fans spin, LEDs light up) but does not display anything and produces no POST beeps. The motherboard has four diagnostic LEDs labeled CPU, DRAM, VGA, and BOOT. When the system is powered on, the DRAM LED remains solid red. The technician has verified that the RAM module (single 16GB DDR4 stick) is fully seated in slot A2, as recommended by the motherboard manual. The technician has also reseated the GPU and checked all power connections. Which of the following should the technician do NEXT?

A user reports that their desktop computer loses network connectivity intermittently. When the problem occurs, the link light on the network interface card (NIC) is off. The technician has replaced the Ethernet cable and tried a different port on the switch, but the issue persists. The technician notices that the desktop is located in a cubicle next to a large metal filing cabinet. Which of the following is the MOST likely cause of the intermittent connectivity?

A technician is troubleshooting a desktop PC that fails to boot. When the power button is pressed, the system powers on for approximately 5 seconds, then shuts down and immediately restarts, repeating this cycle. The technician has replaced the power supply, reseated all components, and verified there are no loose screws or shorts. The motherboard has diagnostic LEDs, and the CPU LED glows solid red when the system attempts to start. The CPU is an Intel Core i7-12700K (LGA1700) installed in a compatible motherboard. The cooler is properly mounted with thermal paste applied. Which of the following is the MOST likely cause?

A technician is troubleshooting a desktop PC that freezes for several seconds during disk-intensive operations, such as transferring large files. The technician has already replaced the hard drive with an SSD, tested the RAM with a memory diagnostic tool (no errors), and updated the chipset drivers. The issue still occurs. Which of the following is the MOST likely remaining cause of the freezes?

A technician installed a new high-end graphics card in a desktop PC. The system powers on, fans spin, but the monitor remains black. The monitor works fine when connected to the motherboard's integrated video port. The technician has reseated the graphics card, connected the necessary PCIe power cables, and verified the card is fully inserted in the primary PCIe x16 slot. Which of the following is the MOST likely next step to resolve the issue?

A technician is troubleshooting a desktop computer that experiences brief network disconnections lasting 5-10 seconds several times an hour. During the disconnections, the network activity and link lights on both the NIC and the switch remain illuminated. The technician has replaced the Ethernet cable, updated the NIC driver, and disabled power saving settings for the NIC. The issue persists. Which of the following should the technician do NEXT?

A user reports that their desktop computer shuts down unexpectedly without warning, typically when playing graphics-intensive games or running video rendering software. The technician has verified that the CPU cooler is properly seated with fresh thermal paste and that all fans spin freely. The event logs show a kernel-power error 41. Which of the following should the technician do NEXT?

A network printer with a static IP address of 192.168.1.100/24 is unreachable from all workstations on the same subnet. The technician can successfully ping the printer's IP address. The printer's web interface loads when accessed from a browser, but shows the status as 'Offline.' Print jobs sent from workstations remain in the queue with a 'printing' status and are never printed. Which of the following is the MOST likely cause?

A technician is troubleshooting a desktop PC in a small office. The PC can access local network resources (file servers, printers) by IP address but cannot access any external websites by domain name or IP address. The PC uses a static IP configuration: IP 192.168.1.100, subnet mask 255.255.255.0, default gateway 192.168.1.1, DNS server 192.168.1.1. The technician successfully pings 192.168.1.1 and 8.8.8.8 fails. Pinging 8.8.8.8 from another PC on the same network succeeds. Which of the following is the MOST likely cause?

A technician is troubleshooting a desktop PC that randomly shuts down without warning, particularly when the user runs resource-intensive applications like video editing software. The technician has already replaced the power supply, verified that the CPU temperature remains within normal limits under load, and updated all drivers. The event logs show a kernel-power 41 error with no preceding critical errors. Which of the following should the technician check NEXT?

A user reports that the network printer in the office is no longer accessible from any workstation after an overnight power outage. The printer has a static IP address of 192.168.1.50. The technician checks the printer and sees it is powered on, the network cable is connected, and the link light on both the printer and the switch port is solid. The technician pings 192.168.1.50 from a workstation, but there is no reply. The technician checks the printer's network settings from its front panel and sees that the IP address is 169.254.10.25. Which of the following is the MOST likely cause of this issue?

A user reports that their desktop computer shuts down unexpectedly after about 10 minutes of use. The computer can be turned back on immediately after shutdown, and no error messages are displayed. The technician suspects the CPU is overheating. Which of the following steps should the technician take FIRST to confirm this suspicion?

A technician is troubleshooting a laser printer that produces pages with faint text and a gray background. The toner cartridge has already been replaced with a new one, but the issue persists. Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop computer that powers on. The case fans and power supply fan spin, but the monitor displays 'No Signal' and the keyboard and mouse do not light up. No beep codes are heard. Which component is MOST likely causing the issue?

A technician is troubleshooting a network issue in an office. Users connected to a specific wall jack report intermittent connectivity. The switch port corresponding to that jack shows a high number of CRC errors. The technician removes the wall plate and finds that the twisted pairs are untwisted too far back from the RJ45 connector. Which of the following is the MOST likely cause of the CRC errors?

A user reports that their laptop is connected to the office Wi-Fi and can browse the internet, but cannot access any shared folders on the network. Other laptops on the same Wi-Fi can access the shares without issue. The laptop received a valid IP address from DHCP. Which of the following should the technician check FIRST?

A technician replaced a damaged Cat5e patch cable that connected a workstation to a wall jack. After replacement, the workstation reports a network connection speed of 100 Mbps instead of the expected 1 Gbps. Both the workstation's NIC and the switch port support 1 Gbps. Which of the following is the MOST likely cause of the reduced speed?

A technician replaced the toner cartridge in a laser printer. Now the printer produces pages with vertical black streaks down the entire page. The toner cartridge is confirmed to be a genuine, new cartridge. Which component should the technician inspect or replace NEXT?

A technician is troubleshooting a laser printer that produces pages with horizontal white lines running across the printed text. The toner cartridge has been replaced with a new one, and the issue persists. Which printer component should the technician inspect or replace NEXT?

After a thunderstorm, a user reports that their desktop computer cannot connect to the network. The technician observes that the Ethernet port on the computer has a steady green link light but no amber activity light. The switch port corresponding to the user's cable also shows a link light. The computer's operating system shows an IP address of 169.254.1.10. Which of the following is the MOST likely cause?

A technician is troubleshooting a desktop computer that will not boot. The computer powers on, the fans spin, but the screen remains black. The technician hears a series of beeps: one long beep followed by two short beeps. This pattern repeats. Which component is MOST likely causing the issue?

A technician is troubleshooting a laser printer that produces pages with horizontal black lines across the entire page. The toner cartridge was recently replaced with a new, genuine cartridge. Which of the following components should the technician inspect or replace NEXT?

A user reports that their workstation experiences intermittent network drops and slow speeds. The technician checks the switch port status and notices a high number of late collisions. The workstation's network adapter is set to auto-negotiate. The switch port is also set to auto-negotiate but the technician observes that the link has negotiated at 100 Mbps half-duplex. Which of the following is the MOST likely cause of this issue?

A technician is troubleshooting a workstation that cannot connect to the network. The technician sees that the Ethernet cable used is a crossover cable. The workstation's network adapter supports Auto-MDI/X. The switch port does not have any link light. Which of the following is the MOST likely reason for the lack of connectivity?

A user reports that their workstation experiences intermittent network disconnections, often during peak office hours. The technician tests the Cat6 Ethernet cable with a continuity tester; the cable passes all four pairs. The network adapter is set to auto-negotiate and reports a link speed of 1 Gbps when connected. However, after observing the switch port, the technician notices a high number of CRC errors and late collisions. The cable runs through a dropped ceiling and is routed near fluorescent light ballasts. Which of the following should the technician do FIRST to resolve the issue?

A user reports that their VoIP desk phone intermittently drops audio during calls. The phone is connected to a PoE switch via a Cat5e cable that runs through a drop ceiling. The switch shows the port is providing PoE and the cable length is approximately 75 meters. The technician tests the cable with a certifier and it passes. Which of the following should the technician do NEXT to resolve the issue?

A technician is troubleshooting a laser printer that produces pages with vertical black streaks running from the top to the bottom of the page. The technician has already replaced the toner cartridge and the drum unit, but the problem persists. Which printer component should the technician inspect or replace NEXT?

A user reports that their workstation experiences intermittent network drops and slow performance. The technician checks the switch port statistics and observes a high number of late collisions and CRC errors. The workstation's NIC is set to auto-negotiate, and the switch port is manually configured for 100 Mbps full duplex. Which two of the following are the MOST likely causes of this problem? (Select TWO).

A technician is troubleshooting a server with a RAID 5 array consisting of three hard drives. The server logs show a failed drive, and the array status is 'Degraded'. The technician replaces the failed drive with a new drive of the same model and capacity. After the rebuild process completes, the array status remains 'Degraded'. The server's OS does not show any new disk errors. Which of the following should the technician check NEXT?

A technician is troubleshooting a workstation that cannot connect to the network. The link light on the network interface card (NIC) is solid, and the technician can successfully ping the loopback address (127.0.0.1). Running ipconfig shows an IP address of 169.254.15.200 with a subnet mask of 255.255.0.0. Which of the following is the most likely cause of the connectivity issue?

A technician is troubleshooting a workstation that cannot connect to the network. The link light on the NIC is off. The technician tests the Ethernet cable with a cable tester and it passes all four pairs. The workstation is connected to a wall jack that leads to a patch panel in the server room. The technician verifies that the patch cable from the patch panel to the switch is good. Which of the following should the technician do NEXT?

A technician is troubleshooting a workstation that has intermittent network connectivity. The workstation is connected to a wall jack via a Cat6 cable. The wall jack is connected to a patch panel in the server room. The technician replaces the NIC and the cable to the workstation, but the issue persists. The technician then uses a loopback plug on the wall jack and tests connectivity from the patch panel using a toner and probe; the tone is clear. Which of the following should the technician check NEXT?

A user reports that their desktop monitor displays 'No Signal' after the user moved the desk. The technician observes that the monitor's power LED is on, the computer's fans are spinning, and the power light on the PC case is lit. The video cable (HDMI) is securely connected at both ends. Which of the following should the technician check NEXT?

A network technician is troubleshooting an issue where users in the Sales department cannot access a file server located in the Engineering department. The network consists of multiple switches connected via fiber optic cables. The technician verifies that the file server is online and can be pinged by its IP address from a Sales workstation. However, when attempting to access the file server by its hostname (\\fileserver\share), the access fails. Which of the following should the technician check FIRST?

A technician is troubleshooting a desktop PC that was functioning normally before the user cleaned the inside with compressed air. After reassembly, the PC powers on (fans spin, LEDs light) but there is no video output and no POST beeps. The technician has already reseated the RAM, GPU, and all power cables. Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop PC that randomly shuts down after about 30 minutes of use. The technician has already swapped the power supply unit (PSU) with a known-good 550W unit, but the issue persists. The system is running a standard productivity workload with no overtaxing of components. Which of the following should the technician check NEXT?

A technician is troubleshooting a printing issue. A user can successfully ping the network printer (IP: 192.168.1.100) from their workstation on the same subnet, but when sending a print job, the printer does not respond. The printer's web interface shows it is online and ready. Which of the following should the technician check NEXT?

A technician is troubleshooting a desktop computer that powers on for about two seconds and then immediately shuts down. The case fans spin briefly, the CPU fan starts, then everything stops. The technician has tested the power supply with a multimeter and all voltages are within specification. The technician has also removed all add-on cards, disconnected all drives, and reseated the RAM and CPU power cables. The problem persists. Which of the following is the MOST likely cause?

A user reports that their network printer is not responding to print jobs sent from their Windows workstation. The technician can successfully ping the printer's IP address (192.168.1.50) from the user's computer. The printer's web interface shows it is online and ready. The technician checks the print queue on the workstation and sees documents stuck with an 'Access Denied' error. Which of the following should the technician check NEXT?

A technician is troubleshooting a desktop PC that intermittently loses network connectivity. The technician has replaced the network cable with a known-good cable and verified that the switch port link light is solid. The issue still occurs. Which of the following should the technician check NEXT?

A user reports that their desktop computer emits a series of long beeps when powered on, and the screen remains blank. The technician reseats the RAM modules and the video card, but the problem persists. The motherboard has four RAM slots, and two modules are installed in slots A1 and A2. Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop computer that powers on but the monitor displays 'No Signal.' The PC fans spin and the power LED is on. The technician has already reseated the graphics card and tried a different monitor and cable. The motherboard has integrated graphics, but the CPU does not support integrated graphics. The technician checks and finds that the graphics card's power connectors are not all plugged in. The card requires both a 6-pin and an 8-pin PCIe power connector, but only the 6-pin is connected. Which of the following should the technician do NEXT?

A technician runs a new Cat6 Ethernet cable between a switch in the server room and a workstation in an office. The cable run is approximately 120 meters long. The workstation shows a 'Network cable unplugged' error and the switch port LED does not light. The technician confirms the cable is properly terminated with T568B on both ends and the switch port is enabled. Which of the following is the MOST likely cause of the issue?

A technician is troubleshooting a user's workstation that experiences intermittent network disconnections. The technician has replaced the network interface card (NIC) and the Ethernet cable with known-good components. The switch port link light remains solid when the connection is up, but the problem still occurs. Upon inspecting the switch's interface statistics, the technician notices a high number of CRC (Cyclic Redundancy Check) errors on that port. Which of the following is the MOST likely cause of the issue?

A technician upgrades a workstation's RAM from 8GB to 16GB by installing two matching 8GB DDR4-3200 modules in the correct dual-channel slots (A2 and B2) on the motherboard. The system boots, but the POST beep code indicates a memory error. The technician tests each module individually in slot A2 and both modules work fine. When both modules are installed in A2 and B2, the error returns. The technician has confirmed the motherboard supports 32GB total and the modules are on the manufacturer's Qualified Vendor List (QVL). Which of the following is the MOST likely cause?

A technician is troubleshooting a desktop computer that shuts down unexpectedly after about 15 minutes of running a graphics-intensive application. The computer operates normally during light use, such as web browsing and word processing. The technician has verified that all cooling fans are spinning and that the CPU and GPU temperatures are within normal ranges. Which of the following is the MOST likely cause of the issue?

A technician relocates a workstation to a different office. The workstation's link light on the NIC is solid green, and the switch port link light is also solid. The workstation shows a valid IP address but cannot ping any other devices on the network, including the default gateway. The technician verifies that the IP configuration is correct and that other devices on the same switch can communicate. Which of the following is the MOST likely cause?

A technician is troubleshooting a desktop computer that randomly reboots under heavy CPU load. The technician has verified the CPU cooler is properly seated with thermal paste, run memory diagnostics (no errors), replaced the power supply, and updated all drivers. Running a CPU stress test causes the system to reboot after approximately 10 minutes. Which of the following should the technician check NEXT?

A technician installs a new discrete graphics card into a desktop computer that previously relied on integrated graphics. After installation, the monitor remains black with no display, and no POST beep codes are heard. The system fans spin, and the power LED is on. The technician reseats the graphics card and verifies that the PCIe power cables are connected. The monitor and cable are known to work with other computers. Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop computer that was functioning normally before a power outage. After the outage, pressing the power button causes the fans to spin briefly (about 1-2 seconds) and then stop. The power LED also lights momentarily. The technician has replaced the power supply unit with a known-good unit of the same wattage, but the symptom persists. The technician has verified the new PSU outputs correct voltages on all rails with a multimeter. Which of the following should the technician check NEXT?

A technician presses the power button on a desktop computer. The power LED turns on, all fans spin, but the monitor remains black and no POST beep codes are heard. The technician reseats the RAM modules into their slots and then the computer boots normally. Which of the following was MOST likely the cause of the issue?

A technician installs a new Gigabit Ethernet NIC in a workstation to replace a faulty onboard NIC. After installation, the technician connects the Ethernet cable from the switch to the new NIC. The link light on the new NIC is off. The technician swaps the cable with a known-good cable, but the light remains off. The new NIC is detected in Device Manager with no errors. The technician tries the new NIC in another workstation and it works fine. Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop computer that does not power on. The computer was working earlier that day. The technician verifies that the power cord is firmly connected to both the computer and the wall outlet. The power outlet is functional. When the power button is pressed, no fans spin and no LEDs light up. The technician opens the case and sees that the power supply unit's fan is not spinning. Using a multimeter, the technician measures the voltage on the 24-pin motherboard connector and finds that the +5V and +12V rails are within normal range. Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop PC that randomly restarts during intensive tasks, such as rendering video. The technician has replaced the power supply, updated drivers, run memory diagnostics, and verified CPU temperatures. The problem persists. The technician examines the motherboard and notices that several capacitors near the CPU socket appear slightly domed on top. Which of the following is the MOST likely cause of the random restarts?

A technician is troubleshooting a workstation that has a solid link light on its NIC and on the switch port, but the workstation fails to obtain an IP address via DHCP. The technician manually assigns a static IP and can ping other devices, but experiences slow transfers and packet loss. Checking the switch's port statistics reveals a high number of CRC errors and runts. Which of the following is the MOST likely cause?

A technician is troubleshooting a workstation that has intermittent network connectivity. The link light on the NIC is blinking, but the workstation frequently loses connection for several seconds at a time. The technician notices the patch cable runs along the ceiling near a fluorescent light fixture. The cable is an unshielded Cat5e cable. Which of the following is the MOST likely cause of the intermittent issue?

A technician is troubleshooting a workstation that lost network connectivity after a lightning storm. The workstation's Ethernet link light on both the NIC and the switch port is solid, but the workstation cannot access any network resources. The technician can ping 127.0.0.1 successfully. When pinging the default gateway (192.168.1.1), the request times out. The technician connects a known-good laptop to the same switch port and cable, and the laptop accesses the network normally. Which of the following is the MOST likely cause?

A technician is adding a new RAID controller to a server. After installing the card into a PCIe slot and connecting the internal cables, the server powers on but does not POST. The fans spin and power LED is on, but there is no display output or beep codes. The technician removes the RAID controller and the server boots normally. The technician reseats the controller in a different PCIe slot, but the same symptom occurs. The controller is listed as compatible with the server model. Which of the following is the MOST likely cause?

A technician installs a new high-performance graphics card into a desktop workstation. The card requires two 6-pin PCIe power connectors. The technician connects the appropriate cables from the power supply, but the system fails to POST; the monitor remains black, although all fans spin including the graphics card fans. The technician verifies that the monitor works with another computer and that the card is fully seated in the PCIe x16 slot. Which of the following is the MOST likely cause of the issue?

A technician is troubleshooting a laptop that will not display an image on its built-in screen. When the power button is pressed, the power LED turns on, the fan spins, and the technician can hear the Windows startup sound. Connecting an external monitor via HDMI shows the desktop correctly. The technician has already tried adjusting the screen brightness using the function keys, but there is no change. The laptop was working normally yesterday and was not dropped. Which of the following components is MOST likely faulty?

A technician is troubleshooting a Windows 10 workstation that cannot access network shares on a file server. The technician confirms that the workstation can ping the server by IP address and by hostname. The technician tests access from another workstation on the same subnet and successfully maps the network drive. On the problematic workstation, the technician runs the command 'net use * \\server\share' and receives the error 'System error 53 has occurred. The network path was not found.' Which of the following is the MOST likely cause of this error?

A technician is troubleshooting a network printer issue. The printer is connected via Ethernet to a managed switch. Users on some workstations can print without problems, but users on other workstations cannot. On a problematic workstation, the technician can ping the printer's IP address successfully and can access the printer's built-in web interface. When attempting to print a test page, the job appears in the local print queue on the workstation but never reaches the printer. The printer's event log shows no errors or rejected jobs. Which of the following is the MOST likely cause?

A technician installs a new network interface card (NIC) into a desktop computer. After installation, the computer boots normally and the NIC is detected in Device Manager without errors. When an Ethernet cable is connected, the link light does not light up on the NIC or the switch port. The cable is known to work with another computer. The technician tries a different port on the same switch, but the link light remains off. Which of the following should the technician do NEXT?

A user reports that their workstation can access the internet but cannot access network shares on the local file server. The technician runs ipconfig and sees IP address 192.168.1.100, subnet mask 255.255.255.0, default gateway 192.168.1.1. The technician successfully pings the gateway and a public IP address (8.8.8.8). However, pinging the file server at 192.168.1.50 fails with 'Request timed out'. Other workstations on the same subnet can access the file server. Which of the following is the MOST likely cause?

A user reports that their desktop computer intermittently freezes and emits a series of beeps (one long, three short) during the boot process. The technician opens the case and notes that the CPU fan spins, but the system does not POST. The technician swaps the RAM modules with known-good modules from another identical system, but the issue persists. Which of the following components is MOST likely faulty?

A technician is troubleshooting a desktop computer that randomly restarts when running graphically intensive applications like games. The technician has verified that the CPU and GPU temperatures are within normal limits. The power supply unit (PSU) is rated at 400W, and the system includes an Intel Core i7-10700 (125W TDP) and an NVIDIA GeForce RTX 3060 (170W TDP), along with several drives and fans. Which of the following is the MOST likely cause of the random restarts?

A technician is troubleshooting a workstation that cannot access any network resources. The technician runs ipconfig and sees that the IP address is 169.254.10.50 with subnet mask 255.255.0.0. The link lights on the NIC and the switch port are solid green. The technician connects the workstation to a different wall jack using a known-good cable, but the problem persists. Which of the following is the MOST likely cause?

A user reports that their desktop computer will not turn on. The technician presses the power button, but no fans spin, no LEDs light up. The power supply unit (PSU) fan is not spinning. The technician verifies that the power cord is securely connected to the PSU and wall outlet, and that the outlet is functional (tested with a lamp). The PSU has a voltage selector switch set to 115V (correct for the region). Which of the following should the technician do NEXT?

A technician is troubleshooting a desktop computer running Windows 10 that has no network connectivity. The computer is connected via an Ethernet cable to a managed switch. The technician observes that the link light on the network interface card (NIC) is off, but the link light on the switch port is solid green. The technician tests the Ethernet cable with a cable tester and it passes. Connecting a different laptop to the same cable and switch port results in a successful connection. The technician boots the problematic computer from a Linux live USB drive and finds that the NIC link light comes on and the computer can access the network normally. After rebooting back into Windows, the NIC link light is off again and there is no connectivity. Which of the following is the MOST likely cause of this issue?

After a RAM upgrade, a PC fails to boot and emits memory beep codes. The technician confirms the modules are the correct generation. What is the best next step?

A laser printer produces pages with repeated marks at regular intervals. Replacing the toner cartridge does not resolve the issue. What component is the next likely cause?