220-802 · Question #967
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?
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.
How the community answered
(30 responses)- A7% (2)
- B3% (1)
- C7% (2)
- D83% (25)
Why each option
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.
Disabling the onboard video card would leave the laptop with no working display output and provides no diagnostic information about the LCD.
Adjusting screen resolution changes software display settings and does not help identify or rule out a physical hardware defect in the LCD.
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.
If the external monitor displays a clear image while the laptop LCD shows distortion, the fault is definitively isolated to the LCD panel or its internal cable connection; if the external monitor also shows distortion, the GPU or its drivers are the cause - this single test splits the two most likely causes.
Concept tested: Isolating laptop LCD fault using external monitor
Source: https://learn.microsoft.com/en-us/windows-hardware/drivers/display/display-devices-design-guide
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