CompTIA
220-802 · Question #967
220-802 Question #967: Real Exam Question with Answer & Explanation
The correct answer is D: Connect an external monitor to the laptop.. Connecting an external monitor isolates the LCD panel as a variable, allowing the technician to determine whether the distortion originates in the display itself or the graphics subsystem.
Question
A technician is onsite to troubleshoot a distorted image on a laptop. Which of the following is the BEST way to determine if the LCD screen is the cause of the issue?
Options
- ADisable the onboard video card.
- BAdjust the resolution of the laptop.
- CReinstall video driver in Windows operating system.
- DConnect an external monitor to the laptop.
Explanation
Connecting an external monitor isolates the LCD panel as a variable, allowing the technician to determine whether the distortion originates in the display itself or the graphics subsystem.
Common mistakes.
- A. Disabling the onboard video card would leave the laptop with no working display output and provides no diagnostic information about the LCD.
- B. Adjusting screen resolution changes software display settings and does not help identify or rule out a physical hardware defect in the LCD.
- C. Reinstalling the video driver addresses software-level issues; if the driver were faulty, the distortion would also appear on an external monitor, not just the LCD.
Concept tested. Isolating laptop LCD fault using external monitor
Reference. https://learn.microsoft.com/en-us/windows-hardware/drivers/display/display-devices-design-guide
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