220-1201 Display Devices Practice Test 2 — 15 Questions

Question 1

A customer reports that their laptop screen flickers intermittently, especially when they adjust the lid angle. The image is clear when the screen is at a specific angle but flickers or goes black at others. What is the most likely cause?

Accepted Answer

The display cable is loose or damaged. This scenario describes a classic symptom of a failing or loose display cable, which connects the motherboard to the LCD panel. The cable is often routed through the hinge, and movement causes intermittent contact. Replacing or reseating the cable usually resolves the issue.

Answer

The LCD panel has a dead pixel

Answer

The video card driver is outdated

Answer

The inverter is failing

Question 2

A user complains that their external monitor shows a 'No Signal' message when connected to their laptop via HDMI. The laptop display works fine. You test the monitor with another computer and it works. What should you check first?

Accepted Answer

Press the function key to switch display modes. Since the monitor works with another computer, the issue is likely with the laptop's output or settings. The most common cause is that the laptop is not set to output to the external display. Pressing the function key (e.g., F4 or F8) toggles display modes.

Answer

Replace the HDMI cable

Answer

Update the laptop's BIOS

Answer

Reinstall the graphics driver

Question 3

A technician is setting up a dual-monitor configuration for a financial analyst who needs to see many columns of data side by side. The user wants the sharpest possible text and the highest pixel density. Which type of display panel should the technician recommend?

Accepted Answer

IPS (In-Plane Switching) panel. IPS (In-Plane Switching) panels offer superior color accuracy and wide viewing angles, but for sharp text and high pixel density, the resolution is the key factor. However, among panel types, IPS provides better image quality for text work than TN, though VA offers good contrast. The correct answer here is IPS for overall sharpness and consistency.

Answer

TN (Twisted Nematic) panel

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VA (Vertical Alignment) panel

Answer

OLED (Organic Light Emitting Diode) panel

Question 4

A technician is configuring a new all-in-one PC for a graphic designer. The designer needs to calibrate the display for accurate color reproduction. Which technology should the technician ensure the monitor supports?

Accepted Answer

IPS panel with high color gamut. Color calibration is essential for graphic design work. IPS panels are known for wide color gamuts and consistent color reproduction, making them ideal for this task. TN and VA panels have limitations in color accuracy and viewing angles.

Answer

TN panel with 144Hz refresh rate

Answer

VA panel with high contrast ratio

Answer

OLED panel with burn-in protection

Question 5

A user complains that their external monitor connected via VGA shows a slightly blurry image with faint horizontal lines. The monitor works perfectly with another computer using the same VGA cable. What is the most likely cause?

Accepted Answer

There is a ground loop between the computer and monitor. VGA is an analog signal, and blurry images with horizontal lines often indicate interference or a ground loop issue. Since the monitor and cable work elsewhere, the problem is likely with the computer's VGA output or electrical interference from the computer's power supply. A ground loop can introduce noise into the analog signal.

Answer

The monitor's resolution is set too high for VGA

Answer

The VGA port on the computer has bent pins

Answer

The graphics driver is corrupt

Question 6

A user reports that their laptop's built-in display shows distorted colors and horizontal lines, but when they connect an external monitor via VGA, the external display works perfectly. What is the most likely cause?

Accepted Answer

The laptop's LCD panel or its video cable is damaged. The internal display or its cable/connector is faulty because the external monitor works fine, ruling out the graphics adapter. This isolates the problem to the laptop's LCD panel or its connection.

Answer

The laptop's GPU is failing

Answer

The VGA cable is defective

Answer

The display driver is corrupt

Question 7

A technician is setting up a new all-in-one PC for a reception desk. The PC has a touchscreen display. After installation, the touch function does not respond. The technician has verified that the display works and the OS is loaded. What should the technician check first?

Accepted Answer

Check if the touchscreen driver is installed in Device Manager. Touch functionality often requires a specific driver or calibration. The display works, so the issue is likely driver-related, not hardware. Checking device manager for missing drivers is the logical first step.

Answer

Replace the touchscreen digitizer

Answer

Clean the screen with a microfiber cloth

Answer

Disable and re-enable the touchscreen in BIOS

Question 8

A graphic designer wants to connect three 4K monitors to a single workstation for a video editing suite. The workstation has a graphics card with one HDMI 2.0 port, one DisplayPort 1.4, and one DVI-D port. The monitors all support HDMI and DisplayPort. Which configuration will allow all three monitors to display at 4K resolution simultaneously?

Accepted Answer

Connect one monitor via HDMI, one via DisplayPort, and use a DisplayPort-to-HDMI adapter for the third. DVI-D does not support 4K at 60Hz; it maxes out at 2560x1600. To run three 4K monitors, the technician must use adapters to convert DisplayPort to HDMI for the third monitor, as HDMI and DisplayPort both support 4K.

Answer

Connect one monitor via HDMI, one via DisplayPort, and one via DVI-D

Answer

Use a DisplayPort hub to connect all three monitors to the single DisplayPort

Answer

Replace the graphics card with one that has three DisplayPorts

Question 9

A user says their monitor suddenly turned off and will not power on. The power LED on the monitor is off. They have checked the power cable and it is securely connected. What should the technician do next?

Accepted Answer

Test the power outlet with a known-working device. If the power LED is off and the cable is secure, the next step is to test the power outlet with another device to rule out a dead outlet. This follows a logical troubleshooting process.

Answer

Replace the monitor's internal power supply

Answer

Reseat the video cable connecting the monitor to the PC

Answer

Replace the monitor with a new one

Question 10

A technician is installing a new video card in a desktop PC used for graphic design. The card has one HDMI port, one DisplayPort, and two DVI ports. The user wants to connect two 1920x1080 monitors. Which combination of ports and cables will provide the best image quality and support for both monitors?

Accepted Answer

Use the HDMI port for one monitor and the DisplayPort for the other. HDMI and DisplayPort both support 1920x1080 at high quality and are digital, ensuring the best image. DVI is also digital but less common for modern monitors; using two digital connections is optimal.

Answer

Use the HDMI port for one monitor and a DVI port for the other

Answer

Use both DVI ports for the monitors

Answer

Use a DisplayPort splitter to run both monitors from the single DisplayPort

Question 11

A technician is configuring a dual-monitor setup for a stock trader. The primary monitor is a 27-inch 1440p display connected via DisplayPort, and the secondary is a 24-inch 1080p display connected via HDMI. The user notices that windows dragged to the secondary monitor appear stretched. What is the most likely cause?

Accepted Answer

The secondary monitor's resolution is set to 1440p instead of 1080p. Mismatched resolutions cause scaling issues; the secondary monitor's native 1080p resolution should be set in display settings. Stretching occurs when the resolution is set incorrectly, not matching the monitor's native resolution.

Answer

The HDMI cable is not version 2.0 or higher

Answer

The graphics card cannot support two different resolutions

Answer

The secondary monitor is set to extend mode instead of duplicate

Question 12

A user reports that their 4K monitor connected via DisplayPort 1.2 only shows a 30Hz refresh rate at native resolution, causing mouse movement to feel laggy. The monitor supports 60Hz at 4K. What is the most likely cause?

Accepted Answer

The DisplayPort cable is only rated for DisplayPort 1.1. DisplayPort 1.2 can support 4K at 60Hz, but the cable must be rated for that bandwidth. A cable that only meets DP 1.1 standards will limit the refresh rate. This tests knowledge of cable bandwidth limitations.

Answer

The monitor's firmware is outdated

Answer

The graphics card does not support 4K at 60Hz

Answer

The monitor's refresh rate is set to 30Hz in the display settings

Question 13

A customer reports that their external monitor connected via HDMI flickers intermittently. They have tried a different HDMI cable and a different monitor, but the issue persists. The laptop display works fine. Which component is most likely causing the problem?

Accepted Answer

The laptop's HDMI port. The HDMI port on the laptop is the most likely cause because the issue follows the laptop, not the cable or monitor. This tests the ability to isolate a faulty display output port through process of elimination.

Answer

The laptop's graphics driver

Answer

The HDMI cable

Answer

The external monitor

Question 14

A technician is troubleshooting a desktop PC that displays a blank screen on boot. The monitor's power LED is on (green), but no image appears. The PC beeps once during startup, and the hard drive activity light flashes. Which component is most likely faulty?

Accepted Answer

The video card. A single beep usually indicates a successful POST, meaning the CPU and RAM are working. The blank screen with no image suggests the video card or its connection is failing, as the monitor is receiving power.

Answer

The CPU

Answer

The RAM

Answer

The monitor's power supply

Question 15

A user complains that text on their new 27-inch 4K monitor appears very small and hard to read. The display is set to its native resolution. What is the most effective way to make text readable without sacrificing image quality?

Accepted Answer

Increase the display scaling percentage in OS settings. Adjusting the display scaling in the operating system increases the size of text and UI elements while keeping the native resolution, preserving sharpness. Lowering resolution would make text larger but blurry.

Answer

Reduce the screen resolution to 1920x1080

Answer

Replace the monitor with a lower-resolution model

Answer

Adjust the monitor's physical sharpness setting