Sample questions
CompTIA A+ Core 1 220-1201 practice questions
A customer reports that their laptop's touchpad is unresponsive after they spilled a small amount of liquid on the keyboard. The laptop still powers on and the keyboard works. What is the most likely issue?
Trap 1: The touchpad driver is corrupted.
Driver corruption is possible but less likely immediately after a liquid spill; hardware damage is the primary concern.
Trap 2: The battery is swollen and pressing on the touchpad.
A swollen battery might cause a bulging trackpad but not sudden unresponsiveness after a spill.
Trap 3: The touchpad is disabled in the BIOS.
A BIOS setting change would not occur spontaneously from a liquid spill.
- A
The touchpad driver is corrupted.
Why wrong: Driver corruption is possible but less likely immediately after a liquid spill; hardware damage is the primary concern.
- B
The touchpad ribbon cable is damaged or disconnected.
Liquid can corrode or short the touchpad's ribbon cable, causing it to stop working while the keyboard (on a different circuit) still functions.
- C
The battery is swollen and pressing on the touchpad.
Why wrong: A swollen battery might cause a bulging trackpad but not sudden unresponsiveness after a spill.
- D
The touchpad is disabled in the BIOS.
Why wrong: A BIOS setting change would not occur spontaneously from a liquid spill.
A technician is replacing a cracked screen on a smartphone. After removing the old screen, they notice a small, flat, rectangular component with a metal shield is loose near the battery connector. What should they do?
Trap 1: Discard it as it is not needed for the screen replacement.
The component is part of the phone's hardware; discarding it would cause a loss of functionality.
Trap 2: Solder it back onto the motherboard.
The vibrator motor is not soldered; it connects via a flex cable or contacts, and soldering would damage it.
Trap 3: Leave it loose; it will not affect screen operation.
Leaving it loose can cause rattling and vibration failure, leading to customer dissatisfaction.
- A
Discard it as it is not needed for the screen replacement.
Why wrong: The component is part of the phone's hardware; discarding it would cause a loss of functionality.
- B
Reattach it using double-sided adhesive tape.
The vibrator motor is typically held in place with adhesive; using new adhesive ensures it stays secure.
- C
Solder it back onto the motherboard.
Why wrong: The vibrator motor is not soldered; it connects via a flex cable or contacts, and soldering would damage it.
- D
Leave it loose; it will not affect screen operation.
Why wrong: Leaving it loose can cause rattling and vibration failure, leading to customer dissatisfaction.
A user complains that their tablet's battery drains very quickly, even when not in use. The device is one year old and was working normally until last week. Which hardware component is most likely failing?
Trap 1: The charging port is loose.
A loose charging port would cause intermittent charging, not rapid battery drain when not in use.
Trap 2: The power management IC is faulty.
While possible, a faulty PMIC is less common than battery degradation; battery issues are more typical after a year.
Trap 3: The screen brightness is set too high.
High brightness drains battery during use, but not significantly when the device is idle.
- A
The charging port is loose.
Why wrong: A loose charging port would cause intermittent charging, not rapid battery drain when not in use.
- B
The battery has degraded or is failing.
A failing battery cannot hold a charge and will discharge quickly, even in standby.
- C
The power management IC is faulty.
Why wrong: While possible, a faulty PMIC is less common than battery degradation; battery issues are more typical after a year.
- D
The screen brightness is set too high.
Why wrong: High brightness drains battery during use, but not significantly when the device is idle.
A technician is installing a new SSD into a customer's laptop. After removing the bottom cover, they see the existing hard drive is held in place by a metal bracket and a single screw. What is the correct next step?
Trap 1: Pull the drive straight out with force to disconnect it.
Forcing the drive can break the SATA connector or the drive itself.
Trap 2: Use a plastic spudger to pry the drive from the connector.
Prying can damage the connector; the drive should be lifted after removing the bracket.
Trap 3: Remove the battery first to avoid electrical shock.
While removing the battery is a safety best practice, it is not the immediate next step for drive removal.
- A
Remove the screw and bracket, then gently lift the drive out of the SATA connector.
This is the correct method to safely remove the drive without damaging the connector.
- B
Pull the drive straight out with force to disconnect it.
Why wrong: Forcing the drive can break the SATA connector or the drive itself.
- C
Use a plastic spudger to pry the drive from the connector.
Why wrong: Prying can damage the connector; the drive should be lifted after removing the bracket.
- D
Remove the battery first to avoid electrical shock.
Why wrong: While removing the battery is a safety best practice, it is not the immediate next step for drive removal.
A technician is troubleshooting a laptop that will not charge. The battery is removable, and the power adapter works on another laptop. When the battery is inserted, the laptop powers on but shows '0% available (plugged in, not charging)'. What is the most likely cause?
Trap 1: The charging port is loose.
A loose port would cause intermittent charging or no power at all, not a consistent 'not charging' status.
Trap 2: The power management driver is outdated.
Driver issues can cause charging problems, but a hardware failure is more likely given the battery's age and symptoms.
Trap 3: The CMOS battery is dead.
A dead CMOS battery affects system clock and BIOS settings, not main battery charging.
- A
The battery is defective and needs replacement.
A battery that cannot charge despite being detected is typically failed; replacing it resolves the issue.
- B
The charging port is loose.
Why wrong: A loose port would cause intermittent charging or no power at all, not a consistent 'not charging' status.
- C
The power management driver is outdated.
Why wrong: Driver issues can cause charging problems, but a hardware failure is more likely given the battery's age and symptoms.
- D
The CMOS battery is dead.
Why wrong: A dead CMOS battery affects system clock and BIOS settings, not main battery charging.
A customer brings in a smartphone with a broken charging port. They want the port replaced. During disassembly, the technician finds that the charging port is soldered directly to the main board. Which tool is essential for this repair?
Trap 1: A heat gun with a narrow nozzle.
A heat gun is used for reflowing BGA chips, not for desoldering a small port; it may overheat the board.
Trap 2: A Phillips-head screwdriver.
A screwdriver is used for screws, not for soldered components.
Trap 3: A plastic spudger.
A spudger is for prying and disconnecting cables, not for soldering.
- A
A heat gun with a narrow nozzle.
Why wrong: A heat gun is used for reflowing BGA chips, not for desoldering a small port; it may overheat the board.
- B
A soldering iron with a fine tip.
A fine-tip soldering iron allows precise desoldering and soldering of the small pins on the charging port.
- C
A Phillips-head screwdriver.
Why wrong: A screwdriver is used for screws, not for soldered components.
- D
A plastic spudger.
Why wrong: A spudger is for prying and disconnecting cables, not for soldering.
A technician is upgrading the RAM in a laptop. After installing two new 8GB sticks, the laptop fails to boot and emits a series of beeps. What is the most likely cause?
Trap 1: The RAM is not compatible with the motherboard.
Incompatibility is possible, but beep codes more often point to seating issues; compatibility would likely cause no boot at all without beeps.
Trap 2: The laptop's BIOS needs to be updated.
BIOS updates are rarely needed for RAM upgrades; beep codes indicate a hardware fault, not a software issue.
Trap 3: The RAM was installed in the wrong orientation.
RAM modules are keyed to prevent incorrect orientation; forcing them would damage the slot.
- A
The RAM is not compatible with the motherboard.
Why wrong: Incompatibility is possible, but beep codes more often point to seating issues; compatibility would likely cause no boot at all without beeps.
- B
The RAM modules are not fully seated in the slots.
Improper seating is a common error; the modules should click into place and the clips should lock.
- C
The laptop's BIOS needs to be updated.
Why wrong: BIOS updates are rarely needed for RAM upgrades; beep codes indicate a hardware fault, not a software issue.
- D
The RAM was installed in the wrong orientation.
Why wrong: RAM modules are keyed to prevent incorrect orientation; forcing them would damage the slot.
A user reports that their laptop's keyboard types random characters when certain keys are pressed. The laptop has not been dropped or spilled on. What is the most likely hardware issue?
Trap 1: The keyboard driver is corrupted.
Driver issues typically cause no response or wrong characters from specific keys, not random characters from unrelated keys.
Trap 2: The keyboard ribbon cable is loose.
A loose cable would cause some keys to not work or intermittent failure, not random character output.
Trap 3: The operating system has a malware infection.
Malware can simulate keystrokes, but it would usually produce consistent patterns, not random characters on key press.
- A
The keyboard driver is corrupted.
Why wrong: Driver issues typically cause no response or wrong characters from specific keys, not random characters from unrelated keys.
- B
The keyboard ribbon cable is loose.
Why wrong: A loose cable would cause some keys to not work or intermittent failure, not random character output.
- C
The keyboard has an internal short or faulty controller.
An internal short can cause ghost key presses, leading to random characters. Replacement is necessary.
- D
The operating system has a malware infection.
Why wrong: Malware can simulate keystrokes, but it would usually produce consistent patterns, not random characters on key press.
A technician is repairing a tablet that has a cracked digitizer. The LCD panel is intact and displays correctly. After replacing the digitizer, the touch input is unresponsive. What is the most likely oversight?
Trap 1: The digitizer is not compatible with the tablet model.
Incompatibility would typically cause no touch at all, but the technician likely ordered the correct part; a loose connection is more common.
Trap 2: The LCD panel was damaged during the repair.
The LCD works, so it is not damaged; the digitizer is separate from the LCD.
Trap 3: The tablet's touch controller needs to be calibrated.
Calibration is done after the digitizer is connected and working; no connection means no calibration possible.
- A
The digitizer is not compatible with the tablet model.
Why wrong: Incompatibility would typically cause no touch at all, but the technician likely ordered the correct part; a loose connection is more common.
- B
The digitizer flex cable is not fully seated in the connector.
A partially seated cable will prevent touch input while the display works. Reseating the cable usually fixes it.
- C
The LCD panel was damaged during the repair.
Why wrong: The LCD works, so it is not damaged; the digitizer is separate from the LCD.
- D
The tablet's touch controller needs to be calibrated.
Why wrong: Calibration is done after the digitizer is connected and working; no connection means no calibration possible.
A technician is troubleshooting a laptop that shuts down randomly after a few minutes of use. The fan is spinning, and the vents are clear. The CPU temperature reaches 95°C quickly. What is the most likely cause?
Trap 1: The fan is running at low speed due to a faulty fan controller.
The fan is spinning, so the controller is likely fine; the issue is thermal transfer, not fan speed.
Trap 2: The CPU is faulty and needs replacement.
A faulty CPU is possible but less likely than a thermal paste issue; overheating is a common symptom of poor thermal contact.
Trap 3: The BIOS is set to an aggressive power-saving mode.
Power-saving modes reduce performance, not cause overheating; they would lower temperatures.
- A
The fan is running at low speed due to a faulty fan controller.
Why wrong: The fan is spinning, so the controller is likely fine; the issue is thermal transfer, not fan speed.
- B
The thermal paste between the CPU and heatsink has dried out.
Dried thermal paste reduces heat transfer, causing rapid overheating even with a working fan.
- C
The CPU is faulty and needs replacement.
Why wrong: A faulty CPU is possible but less likely than a thermal paste issue; overheating is a common symptom of poor thermal contact.
- D
The BIOS is set to an aggressive power-saving mode.
Why wrong: Power-saving modes reduce performance, not cause overheating; they would lower temperatures.
A customer brings in a smartphone with a cracked glass digitizer that still responds to touch, but the LCD underneath is intact. They want the cheapest repair that restores full functionality. Which component should you replace?
Trap 1: Replace the entire screen assembly (LCD + digitizer).
This is more expensive than necessary since the LCD is still functional.
Trap 2: Replace only the LCD panel.
The LCD is intact and working; replacing it doesn't fix the cracked digitizer.
Trap 3: Apply a glass screen protector and ignore the crack.
A screen protector doesn't repair the digitizer; touch may still be unreliable and the crack affects usability.
- A
Replace the entire screen assembly (LCD + digitizer).
Why wrong: This is more expensive than necessary since the LCD is still functional.
- B
Replace only the LCD panel.
Why wrong: The LCD is intact and working; replacing it doesn't fix the cracked digitizer.
- C
Replace only the digitizer.
The digitizer is the damaged part; replacing it restores touch functionality at the lowest cost.
- D
Apply a glass screen protector and ignore the crack.
Why wrong: A screen protector doesn't repair the digitizer; touch may still be unreliable and the crack affects usability.
A user reports that their laptop battery no longer charges and the system only runs when plugged in. You test the AC adapter and it outputs correct voltage. Inside the battery, which component is most likely failed?
Trap 1: The lithium-ion cells have degraded.
Degraded cells would still show some charge or cause shorter runtime, not a complete failure to charge.
Trap 2: The DC jack on the laptop is loose.
The DC jack issue would affect power to the whole system, but the system runs fine on AC adapter.
Trap 3: The laptop's motherboard charging circuit is damaged.
If the motherboard circuit were bad, the system wouldn't run on AC power either.
- A
The lithium-ion cells have degraded.
Why wrong: Degraded cells would still show some charge or cause shorter runtime, not a complete failure to charge.
- B
The battery management system (BMS) is faulty.
A failed BMS prevents the battery from communicating with the charger and accepting power, causing no charging.
- C
The DC jack on the laptop is loose.
Why wrong: The DC jack issue would affect power to the whole system, but the system runs fine on AC adapter.
- D
The laptop's motherboard charging circuit is damaged.
Why wrong: If the motherboard circuit were bad, the system wouldn't run on AC power either.
You are deploying 50 tablets for a school and need to secure them in kiosk mode so students can only access a specific learning app. Which hardware servicing step is essential before configuring the software?
Trap 1: Install a screen protector on each tablet.
While protective, this is not essential for kiosk mode configuration.
Trap 2: Remove the SIM card from each tablet.
SIM removal is unnecessary unless cellular access is restricted; kiosk mode can be set with or without it.
Trap 3: Replace the stock ROM with a custom firmware.
Custom firmware voids warranty and is not standard practice for enterprise deployment; kiosk mode uses built-in OS features.
- A
Install a screen protector on each tablet.
Why wrong: While protective, this is not essential for kiosk mode configuration.
- B
Charge each tablet to at least 50% and apply all system updates.
A charged, updated device ensures stable configuration without power loss or update interruptions.
- C
Remove the SIM card from each tablet.
Why wrong: SIM removal is unnecessary unless cellular access is restricted; kiosk mode can be set with or without it.
- D
Replace the stock ROM with a custom firmware.
Why wrong: Custom firmware voids warranty and is not standard practice for enterprise deployment; kiosk mode uses built-in OS features.
A technician is troubleshooting a tablet that has a dim display that flickers intermittently. The device responds to touch and the OS loads normally. Which component is most likely failing?
Trap 1: The digitizer is malfunctioning.
Digitizer failure would affect touch response, which is reported as normal.
Trap 2: The LCD panel has dead pixels.
Dead pixels cause fixed spots, not overall dimness or flickering.
Trap 3: The motherboard GPU is damaged.
GPU damage usually causes artifacts, screen corruption, or no display, not just dimness with normal OS operation.
- A
The digitizer is malfunctioning.
Why wrong: Digitizer failure would affect touch response, which is reported as normal.
- B
The LCD panel has dead pixels.
Why wrong: Dead pixels cause fixed spots, not overall dimness or flickering.
- C
The backlight LED or inverter is failing.
A failing backlight causes dim, flickering display while touch and OS remain functional.
- D
The motherboard GPU is damaged.
Why wrong: GPU damage usually causes artifacts, screen corruption, or no display, not just dimness with normal OS operation.
During a repair, you accidentally dislodged a small ribbon cable connecting the volume button flex to the mainboard of a smartphone. Now the volume buttons don't work. What is the most likely result of this mistake?
Trap 1: The phone won't power on.
The power button uses a separate flex cable; dislodging volume flex does not affect power.
Trap 2: The touchscreen becomes unresponsive.
Touchscreen uses a different flex cable connected to the display assembly.
Trap 3: The speaker stops producing sound.
Speaker uses its own flex cable or soldered connections, not the volume button flex.
- A
The phone won't power on.
Why wrong: The power button uses a separate flex cable; dislodging volume flex does not affect power.
- B
The touchscreen becomes unresponsive.
Why wrong: Touchscreen uses a different flex cable connected to the display assembly.
- C
The volume buttons become unresponsive.
The dislodged flex cable directly controls volume; without connection, buttons don't work.
- D
The speaker stops producing sound.
Why wrong: Speaker uses its own flex cable or soldered connections, not the volume button flex.
A user complains that their smartphone's battery drains quickly even when idle. You run diagnostics and find the battery health is at 82%. The device is two years old. Which hardware servicing action is most appropriate?
Trap 1: Calibrate the battery by fully draining and recharging.
Calibration helps with inaccurate charge reporting, not with actual capacity loss.
Trap 2: Update the operating system to the latest version.
OS updates may improve efficiency but won't fix hardware degradation of the battery.
Trap 3: Disable all background apps and notifications.
This is a software workaround, not a hardware servicing solution for a degraded battery.
- A
Replace the battery with a new OEM battery.
At 82% health, the battery is degraded; replacement directly addresses the drain issue.
- B
Calibrate the battery by fully draining and recharging.
Why wrong: Calibration helps with inaccurate charge reporting, not with actual capacity loss.
- C
Update the operating system to the latest version.
Why wrong: OS updates may improve efficiency but won't fix hardware degradation of the battery.
- D
Disable all background apps and notifications.
Why wrong: This is a software workaround, not a hardware servicing solution for a degraded battery.
A laptop's touchpad is not working correctly; the cursor jumps erratically. You have already updated the driver and checked for debris. What hardware component should you inspect or replace next?
Trap 1: Replace the entire keyboard assembly.
The keyboard is separate from the touchpad; replacing it won't fix touchpad issues.
Trap 2: Replace the laptop's LCD screen.
The LCD screen has no relation to touchpad input.
Trap 3: Reinstall the operating system.
Driver update already done; reinstalling OS is excessive and unlikely to fix a hardware connection issue.
- A
Replace the entire keyboard assembly.
Why wrong: The keyboard is separate from the touchpad; replacing it won't fix touchpad issues.
- B
Reseat the touchpad ribbon cable on the motherboard.
A loose or partially connected ribbon cable is a common cause of erratic touchpad behavior.
- C
Replace the laptop's LCD screen.
Why wrong: The LCD screen has no relation to touchpad input.
- D
Reinstall the operating system.
Why wrong: Driver update already done; reinstalling OS is excessive and unlikely to fix a hardware connection issue.
A technician is servicing a smartphone with a non-functional earpiece speaker during calls, but the loudspeaker works fine. After testing, the earpiece speaker itself is determined to be good. Which component is most likely faulty?
Trap 1: The charging port flex cable.
The charging port flex typically handles power and data, not audio routing.
Trap 2: The SIM card slot.
SIM slot only handles network identification, not audio.
Trap 3: The battery connector.
Battery connector issues would cause power problems, not selective audio failure.
- A
The charging port flex cable.
Why wrong: The charging port flex typically handles power and data, not audio routing.
- B
The mainboard audio IC (codec).
The audio IC controls which speaker receives sound; a fault here can disable the earpiece while leaving the loudspeaker functional.
- C
The SIM card slot.
Why wrong: SIM slot only handles network identification, not audio.
- D
The battery connector.
Why wrong: Battery connector issues would cause power problems, not selective audio failure.
A user reports that their tablet's screen is completely black but the device vibrates when powered on. You have already tried a forced restart and checked for physical damage. What is the most likely hardware cause?
Trap 1: The battery is completely drained.
If the battery were drained, the device wouldn't vibrate on power-on.
Trap 2: The digitizer is cracked.
A cracked digitizer doesn't cause a completely black screen; the LCD would still show an image.
Trap 3: The OS is corrupted.
A corrupted OS would typically show a boot loop or error screen, not a black screen with vibration.
- A
The battery is completely drained.
Why wrong: If the battery were drained, the device wouldn't vibrate on power-on.
- B
The LCD panel or display ribbon cable is faulty.
A black screen with vibration indicates the device boots but the display subsystem is not working, often due to a failed LCD or loose cable.
- C
The digitizer is cracked.
Why wrong: A cracked digitizer doesn't cause a completely black screen; the LCD would still show an image.
- D
The OS is corrupted.
Why wrong: A corrupted OS would typically show a boot loop or error screen, not a black screen with vibration.
A laptop's built-in webcam is not recognized by any application. You have checked Device Manager and the camera is not listed. The webcam ribbon cable appears intact. Which component should you suspect next?
Trap 1: The webcam driver is outdated.
If the device isn't listed in Device Manager, the OS doesn't see the hardware; driver issues occur when the device is present but not functioning.
Trap 2: The laptop's BIOS has the webcam disabled.
A disabled BIOS setting would still show the device in Device Manager as hidden; it wouldn't cause complete absence.
Trap 3: The operating system needs to be reinstalled.
Reinstalling OS is drastic and won't fix a hardware detection issue at the motherboard level.
- A
The webcam driver is outdated.
Why wrong: If the device isn't listed in Device Manager, the OS doesn't see the hardware; driver issues occur when the device is present but not functioning.
- B
The laptop's BIOS has the webcam disabled.
Why wrong: A disabled BIOS setting would still show the device in Device Manager as hidden; it wouldn't cause complete absence.
- C
The webcam module or motherboard USB controller has failed.
Complete absence from Device Manager suggests a hardware failure of the camera module or the motherboard's internal USB controller.
- D
The operating system needs to be reinstalled.
Why wrong: Reinstalling OS is drastic and won't fix a hardware detection issue at the motherboard level.
A user brings in a smartphone with a cracked screen that is still responsive to touch. The device is an older model, and the user wants the screen replaced rather than buying a new phone. After powering off the device and removing the SIM and SD cards, what is the next step in the screen replacement process?
Trap 1: Use a spudger to pry the screen off starting from the bottom.
Prying without heating the adhesive first can crack the glass or damage the display. Heat softens the adhesive, making removal safer.
Trap 2: Remove the battery using a plastic pry tool.
Removing the battery is not the immediate next step; the screen must be detached first. Battery removal may be needed later for access, but not before heating.
Trap 3: Insert a guitar pick under the screen to separate it from the frame.
Inserting a pick without heating first can cause the screen to crack. Heat must be applied to loosen the adhesive before any prying.
- A
Use a spudger to pry the screen off starting from the bottom.
Why wrong: Prying without heating the adhesive first can crack the glass or damage the display. Heat softens the adhesive, making removal safer.
- B
Apply heat to the edges of the screen to soften the adhesive.
Heating the edges softens the adhesive, allowing the screen to be lifted with minimal force and reducing the risk of further damage.
- C
Remove the battery using a plastic pry tool.
Why wrong: Removing the battery is not the immediate next step; the screen must be detached first. Battery removal may be needed later for access, but not before heating.
- D
Insert a guitar pick under the screen to separate it from the frame.
Why wrong: Inserting a pick without heating first can cause the screen to crack. Heat must be applied to loosen the adhesive before any prying.
A customer complains that their laptop battery no longer holds a charge and the laptop only works when plugged in. The technician confirms the battery is removable. What is the most appropriate first step in servicing this issue?
Trap 1: Update the battery driver in Device Manager.
Driver updates won't fix a physically worn-out battery. The battery has reached end of life and needs replacement.
Trap 2: Run a battery calibration utility from the manufacturer.
Calibration may help with inaccurate charge reporting but cannot restore a battery that no longer holds a charge. Replacement is needed.
Trap 3: Replace the AC adapter to see if the charging circuit is faulty.
The symptom is that the laptop works only when plugged in, indicating the battery cannot hold charge. The AC adapter is likely fine.
- A
Update the battery driver in Device Manager.
Why wrong: Driver updates won't fix a physically worn-out battery. The battery has reached end of life and needs replacement.
- B
Run a battery calibration utility from the manufacturer.
Why wrong: Calibration may help with inaccurate charge reporting but cannot restore a battery that no longer holds a charge. Replacement is needed.
- C
Power off the laptop and remove the battery.
Powering off and removing the battery is the safe first step before replacing it. This prevents electrical hazards and damage.
- D
Replace the AC adapter to see if the charging circuit is faulty.
Why wrong: The symptom is that the laptop works only when plugged in, indicating the battery cannot hold charge. The AC adapter is likely fine.
A technician is replacing a cracked screen on a tablet. After removing the digitizer and LCD assembly, they notice the home button flex cable is torn. The tablet still has a physical home button. What should the technician do to ensure the repair is complete and the home button functions?
Trap 1: Solder the torn ends of the flex cable together.
Flex cables are delicate and not designed for soldering; attempting to solder them often causes further damage or unreliable connections.
Trap 2: Use electrical tape to hold the torn cable together.
Taping a torn cable does not restore electrical continuity. The home button will remain non-functional.
Trap 3: Ignore the tear and reassemble the tablet.
Ignoring the tear will leave the home button non-functional, which is an incomplete repair and will likely result in a customer complaint.
- A
Solder the torn ends of the flex cable together.
Why wrong: Flex cables are delicate and not designed for soldering; attempting to solder them often causes further damage or unreliable connections.
- B
Use electrical tape to hold the torn cable together.
Why wrong: Taping a torn cable does not restore electrical continuity. The home button will remain non-functional.
- C
Replace the home button flex cable with a new one.
Replacing the torn flex cable with a new one restores the electrical connection, allowing the home button to function properly.
- D
Ignore the tear and reassemble the tablet.
Why wrong: Ignoring the tear will leave the home button non-functional, which is an incomplete repair and will likely result in a customer complaint.
During a laptop keyboard replacement, a technician accidentally dislodges a small ribbon cable from the touchpad connector. The touchpad is now unresponsive. The technician has never worked on this model before. What is the best course of action to resolve the issue?
Trap 1: Use tweezers to gently push the ribbon cable into any nearby empty…
The cable must be inserted into its specific connector; using an arbitrary connector will not work and may cause a short circuit.
Trap 2: Reboot the laptop to see if the touchpad driver reloads.
The issue is physical disconnection, not a driver problem. Rebooting will not fix a loose cable.
Trap 3: Replace the entire keyboard assembly since the touchpad cable is…
The cable is merely dislodged, not broken. Replacing the entire assembly is unnecessary and costly.
- A
Use tweezers to gently push the ribbon cable into any nearby empty connector.
Why wrong: The cable must be inserted into its specific connector; using an arbitrary connector will not work and may cause a short circuit.
- B
Reboot the laptop to see if the touchpad driver reloads.
Why wrong: The issue is physical disconnection, not a driver problem. Rebooting will not fix a loose cable.
- C
Consult the service manual to identify the correct connector and reseat the cable.
The service manual provides the exact location and orientation for the touchpad ribbon cable, ensuring proper reconnection.
- D
Replace the entire keyboard assembly since the touchpad cable is likely broken.
Why wrong: The cable is merely dislodged, not broken. Replacing the entire assembly is unnecessary and costly.
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