Display Devices practice questions

The HDMI cable is defective.

Why wrong: The user already tried a different cable, so a defective cable is unlikely.

The monitor's refresh rate is set too low.

Why wrong: Low refresh rate causes flicker or motion blur, not static blurry text.

The graphics driver is corrupted.

Why wrong: A corrupted driver would likely cause more severe issues like artifacts or no display, not just blurry text.

Replace the monitor.

Why wrong: Replacing the monitor is premature; the issue is likely environmental.

Change the resolution to a lower setting.

Why wrong: Lower resolution might reduce ghosting but won't fix the underlying interference issue.

Update the graphics driver.

Why wrong: Driver updates won't fix analog signal interference.

Set both monitors to the same resolution.

Why wrong: Setting to the same resolution would degrade the 4K monitor's quality and is not necessary for seamless mouse movement.

Adjust the scaling settings on the 4K monitor.

Why wrong: Scaling affects text and icon size, not mouse movement between monitors.

Set the 4K monitor as the primary display.

Why wrong: Setting a primary display only determines where the taskbar appears, not how the mouse moves between screens.

Replace the monitor.

Why wrong: Replacing the monitor is premature without further troubleshooting.

Check the input source setting on the monitor.

Why wrong: While this is possible, the monitor likely auto-detects the input, and the cable is already secure.

Update the graphics driver.

Why wrong: Driver issues usually cause display problems after boot, not a 'No Signal' message at startup.

4K at 60Hz

Why wrong: HDMI 1.4 cannot output 4K at 60Hz; that requires HDMI 2.0.

1080p at 120Hz

Why wrong: The scenario asks for 4K, and HDMI 1.4 can do 4K at 30Hz, not 1080p at 120Hz.

1440p at 60Hz

Why wrong: While HDMI 1.4 can do 1440p at 60Hz, the customer wants 4K, and the question asks for maximum resolution.

Replace the entire laptop.

Why wrong: Replacing the entire laptop is unnecessary and expensive when only the screen is damaged.

Replace the display cable.

Why wrong: A cracked screen is physical damage, not a cable issue.

Use an external monitor permanently.

Why wrong: While possible, this is not a repair and is less convenient than replacing the panel.

Replace the video cable with a DVI cable.

Why wrong: Changing the cable type won't fix color accuracy issues; it only affects signal transmission.

Update the graphics driver.

Why wrong: While updating drivers can fix some issues, washed-out colors are usually a monitor setting or calibration problem.

Set the resolution to the monitor's native resolution.

Why wrong: Native resolution affects sharpness, not color accuracy.

The touchscreen driver is corrupted.

Why wrong: A corrupted driver would likely cause no response or erratic behavior, not a consistent offset.

The digitizer is failing.

Why wrong: A failing digitizer would cause dead zones or random inputs, not a consistent misalignment.

The operating system needs a touchscreen firmware update.

Why wrong: Firmware updates can fix bugs, but not physical misalignment.

DVI-D dual-link

Why wrong: DVI-D dual-link can support 3440x1440 at 60Hz, but HDMI 1.4 is also capable and more commonly used.

VGA

Why wrong: VGA is analog and cannot support such a high resolution at a usable refresh rate.

DisplayPort

Why wrong: The GPU does not have a DisplayPort port, so this is not an option.

The graphics driver is outdated.

Why wrong: An outdated driver would affect both the internal and external displays.

The LCD panel is failing.

Why wrong: A failing panel usually shows permanent artifacts or lines, not intermittent flickering.

The inverter or backlight is failing.

Why wrong: Backlight issues cause dimming or no display, not flickering.

Ensure the HDMI cable is securely connected

Why wrong: The display works, so the HDMI connection is fine; the issue is with touch data, not video.

Replace the USB cable with a higher-speed version

Why wrong: A standard USB 2.0 cable is sufficient for touch data; speed is not the issue.

Calibrate the touchscreen in Windows settings

Why wrong: Calibration is done after the driver is installed; without the driver, the touchscreen won't appear in settings.

The monitor's HDMI port is defective

Why wrong: The monitor is detected, so the port works; the issue is resolution, not connectivity.

The laptop's graphics driver is outdated

Why wrong: A driver issue would likely cause no detection or artifacts, not a specific resolution limit.

The monitor's refresh rate is set too high

Why wrong: Refresh rate settings don't prevent a resolution from being selected; the OS typically offers the highest supported resolution.

The projector bulb is nearing the end of its life

Why wrong: A dying bulb causes dimness or a yellow tint, not a ghost image with no input.

The input cable is picking up interference

Why wrong: Interference would cause noise or distortion, not a persistent ghost image when no cable is connected.

The projector's lens is dirty

Why wrong: A dirty lens would cause blurriness or spots, not a ghost image of a previous display.

The LCD panel itself

Why wrong: A failing panel would typically show distorted images, lines, or dead pixels, not uniform dimness.

The video cable

Why wrong: A faulty video cable would cause signal issues like artifacts or no display, not uniform dimness.

The power supply unit

Why wrong: A failing PSU would cause the entire computer to shut down or restart, not just affect display brightness.

The monitor's power saving mode is too aggressive

Why wrong: Power saving mode would turn the monitor off after inactivity, not cause intermittent black screens during use.

The graphics card is overheating

Why wrong: Overheating typically causes system crashes or artifacts, not intermittent black screens on the monitor alone.

The monitor's firmware is outdated

Why wrong: Firmware issues are rare and usually cause persistent problems, not intermittent blackouts tied to resolution.

The LCD panel has a dead pixel

Why wrong: A dead pixel would appear as a constant dot, not intermittent flickering related to lid movement.

The video card driver is outdated

Why wrong: Driver issues typically cause persistent display problems, not flickering that changes with physical movement.

The inverter is failing

Why wrong: Inverters are used in CCFL-backlit displays, which are rare in modern laptops; LED-backlit screens don't use inverters.

Replace the HDMI cable

Why wrong: The cable is unlikely to be the issue because the monitor works with another computer using the same cable (if tested).

Update the laptop's BIOS

Why wrong: BIOS updates rarely affect external display detection; this is more likely a software or configuration issue.

Reinstall the graphics driver

Why wrong: While a driver issue could cause this, it's less common than simply not having the correct display mode selected, so it should not be the first step.

TN (Twisted Nematic) panel

Why wrong: TN panels have fast response times but poor viewing angles and color reproduction, making them less suitable for sharp text in a professional setup.

VA (Vertical Alignment) panel

Why wrong: VA panels offer good contrast but can suffer from color shifting at off-angles, which may not be ideal for side-by-side monitors.

OLED (Organic Light Emitting Diode) panel

Why wrong: OLED panels have excellent color and contrast but are more expensive and prone to burn-in with static data like financial spreadsheets.

TN panel with 144Hz refresh rate

Why wrong: High refresh rates are for gaming, not color accuracy; TN panels have poor color reproduction.

VA panel with high contrast ratio

Why wrong: VA panels have good contrast but often struggle with color accuracy compared to IPS.

OLED panel with burn-in protection

Why wrong: OLED offers great color but is prone to burn-in with static elements, and may not be as color-accurate as professional IPS monitors.

The monitor's resolution is set too high for VGA

Why wrong: VGA can support high resolutions, but blurriness from resolution would be consistent, not specific to one computer.

The VGA port on the computer has bent pins

Why wrong: Bent pins would cause missing colors or no display, not a blurry image with lines.

The graphics driver is corrupt

Why wrong: A corrupt driver would cause artifacts or crashes, not a specific analog interference pattern.