220-1201 Display Devices — 15 Questions

Question 1

A user reports that their external monitor connected via HDMI shows a blurry image and the text is hard to read. They have tried a different HDMI cable and the issue persists. What is the most likely cause?

Accepted Answer

The display resolution is set below the monitor's native resolution.. This scenario tests understanding of display resolution settings. The most common cause of blurry text on an external monitor is incorrect resolution scaling, not a cable or driver issue. Adjusting the display resolution to the monitor's native resolution will usually fix the problem.

Answer

The HDMI cable is defective.

Answer

The monitor's refresh rate is set too low.

Answer

The graphics driver is corrupted.

Question 2

A technician is troubleshooting a monitor that displays a 'fuzzy' image with ghosting. The monitor is connected via VGA. The technician has already tried a different VGA cable and the issue persists. What should the technician check next?

Accepted Answer

Route the VGA cable away from power cables and other electronics.. VGA is an analog signal that can be affected by electrical interference. Ghosting and fuzziness are classic symptoms of interference from nearby power cables or other electronics. Moving the VGA cable away from power sources is the next logical step.

Answer

Replace the monitor.

Answer

Change the resolution to a lower setting.

Answer

Update the graphics driver.

Question 3

A technician is configuring a dual-monitor setup for a stock trader. One monitor is a 24-inch 1080p display, and the other is a 27-inch 4K display. The user wants the mouse to move seamlessly between them. What setting must the technician configure in the OS display settings?

Accepted Answer

Arrange the displays in the OS to match their physical positions.. When using monitors with different resolutions, the OS must align the virtual displays correctly. The technician needs to arrange the monitors in the display settings to match their physical layout, ensuring the mouse moves smoothly across the bezels.

Answer

Set both monitors to the same resolution.

Answer

Adjust the scaling settings on the 4K monitor.

Answer

Set the 4K monitor as the primary display.

Question 4

A user reports that their monitor displays a 'No Signal' message when they turn on their computer. The monitor is connected via DisplayPort. The technician checks that the monitor is powered on and the cable is secure. What should the technician check next?

Accepted Answer

Try a different DisplayPort cable or port on the GPU.. DisplayPort cables can sometimes have issues with the locking mechanism or be partially unseated. The next logical step is to try a different DisplayPort cable or port on the GPU to isolate the issue.

Answer

Replace the monitor.

Answer

Check the input source setting on the monitor.

Answer

Update the graphics driver.

Question 5

A customer wants to connect a laptop to a 4K TV for a presentation. The laptop has an HDMI 1.4 port, and the TV supports HDMI 2.0. What is the maximum resolution and refresh rate the customer can expect?

Accepted Answer

4K at 30Hz. HDMI 1.4 supports 4K resolution at 30Hz, while HDMI 2.0 supports 4K at 60Hz. The bottleneck is the laptop's HDMI 1.4 port, so the output will be limited to 4K at 30Hz.

Answer

4K at 60Hz

Answer

1080p at 120Hz

Answer

1440p at 60Hz

Question 6

A user's laptop screen has a small crack in the corner, and the display shows lines and discoloration in that area. The rest of the screen works. What is the most cost-effective solution?

Accepted Answer

Replace the LCD panel.. A cracked LCD panel requires replacement of the entire screen assembly, not just the glass. Replacing the whole LCD panel is the standard and most cost-effective repair for this type of physical damage.

Answer

Replace the entire laptop.

Answer

Replace the display cable.

Answer

Use an external monitor permanently.

Question 7

A technician is installing a new LCD monitor for a user who does photo editing. The user complains that colors appear washed out compared to their old CRT monitor. What should the technician adjust first?

Accepted Answer

Adjust the color settings in the monitor's on-screen display.. LCD monitors often have different color gamuts and settings than CRTs. The most straightforward fix is to adjust the color calibration settings in the monitor's OSD or OS to improve color accuracy.

Answer

Replace the video cable with a DVI cable.

Answer

Update the graphics driver.

Answer

Set the resolution to the monitor's native resolution.

Question 8

A user's all-in-one PC has a touchscreen that is not responding correctly. The technician calibrates the touchscreen, but the issue persists. The technician then notices that the screen is slightly misaligned with the bezel. What is the most likely cause?

Accepted Answer

The LCD panel has shifted inside the chassis.. A misaligned screen relative to the bezel suggests that the LCD panel has shifted inside the chassis. This physical misalignment can cause the touch sensor to be out of sync with the display, leading to touch inaccuracies that calibration cannot fix.

Answer

The touchscreen driver is corrupted.

Answer

The digitizer is failing.

Answer

The operating system needs a touchscreen firmware update.

Question 9

A customer wants to use a 34-inch ultrawide monitor (3440x1440) with their desktop PC. The PC has an older GPU with a DVI-D dual-link port and an HDMI 1.4 port. Which connection should the technician recommend for the best image quality?

Accepted Answer

HDMI 1.4. 3440x1440 at 60Hz requires significant bandwidth. HDMI 1.4 can support this resolution at 60Hz, but DVI-D dual-link can also handle it. However, HDMI is generally preferred for modern monitors, and DVI-D dual-link is less common. The correct answer is HDMI 1.4, as it can support the resolution and is more versatile.

Answer

DVI-D dual-link

Answer

VGA

Answer

DisplayPort

Question 10

A user's laptop screen flickers intermittently, but the external monitor works fine. What is the most likely cause?

Accepted Answer

The display cable connecting the motherboard to the screen is loose or damaged.. Since the external monitor works fine, the issue is likely with the laptop's display components. A loose or failing display cable is a common cause of intermittent flickering on built-in screens.

Answer

The graphics driver is outdated.

Answer

The LCD panel is failing.

Answer

The inverter or backlight is failing.

Question 11

A technician is installing a new touchscreen monitor for a point-of-sale system. The monitor connects via HDMI and USB. The display works, but touch input is not recognized. What should the technician check first?

Accepted Answer

Install the touchscreen driver from the manufacturer. Touchscreen monitors often require both video (HDMI) and data (USB) connections. The USB cable provides the touch data to the computer. If the driver is missing or the USB connection is faulty, touch input won't work. The first step is to verify the USB connection and install the correct driver.

Answer

Ensure the HDMI cable is securely connected

Answer

Replace the USB cable with a higher-speed version

Answer

Calibrate the touchscreen in Windows settings

Question 12

A user connects a 4K monitor to their laptop using a USB-C port. The monitor is detected, but the resolution is stuck at 1920x1080. The laptop supports 4K output via USB-C. What is the most likely reason?

Accepted Answer

The USB-C cable does not support DisplayPort Alt Mode. USB-C can carry video signals via DisplayPort Alt Mode or Thunderbolt, but not all USB-C cables support the necessary bandwidth for 4K. A cable that only supports USB 2.0 or lower data rates cannot handle the high resolution. The user likely needs a cable rated for DisplayPort Alt Mode or Thunderbolt.

Answer

The monitor's HDMI port is defective

Answer

The laptop's graphics driver is outdated

Answer

The monitor's refresh rate is set too high

Question 13

A technician is troubleshooting a projector that displays a faint, ghost-like image even when no input source is connected. The projector has been in use for several years. What is the most likely cause?

Accepted Answer

The LCD panel has image burn-in. This is a classic symptom of a burned-in image on an LCD projector panel. Over time, static images can permanently etch into the panel, causing a ghost image. This is different from a faulty bulb, which would cause dimness or no light.

Answer

The projector bulb is nearing the end of its life

Answer

The input cable is picking up interference

Answer

The projector's lens is dirty

Question 14

A user reports that their desktop computer's display is very dim, even at maximum brightness settings. The monitor is an older LCD model with a CCFL backlight. What component is most likely failing?

Accepted Answer

The inverter board. CCFL-backlit LCD monitors use an inverter to convert DC power to high-voltage AC to light the fluorescent tube. A failing inverter often results in a dim display or one that flickers before failing completely. This is a common failure in older monitors.

Answer

The LCD panel itself

Answer

The video cable

Answer

The power supply unit

Question 15

A user reports that their new high-resolution monitor (2560x1440) connected via DisplayPort shows intermittent black screens for a few seconds. The monitor works fine at lower resolutions. What is the most likely issue?

Accepted Answer

The DisplayPort cable is not certified for the required bandwidth. High resolutions require significant bandwidth over DisplayPort. If the cable is not rated for the required version (e.g., DP 1.2 for 1440p at high refresh rates), it can cause signal loss. The intermittent black screen is a classic symptom of a cable that cannot handle the data rate.

Answer

The monitor's power saving mode is too aggressive

Answer

The graphics card is overheating

Answer

The monitor's firmware is outdated