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220-801 · Question #1029

Joe, a user, reports that his laptop display is very faint and hard to read. Which of the following is the MOST likely cause?

The correct answer is C. The backlight has failed. A very faint but still visible laptop display is the classic symptom of a failed or failing backlight, where the image exists but lacks illumination.

Hardware and network troubleshooting

Question

Joe, a user, reports that his laptop display is very faint and hard to read. Which of the following is the MOST likely cause?

Options

  • AThe video card is failing.
  • BThe display screen has been damaged.
  • CThe backlight has failed.
  • DThe inverter is bad.

How the community answered

(35 responses)
  • A
    9% (3)
  • B
    3% (1)
  • C
    74% (26)
  • D
    14% (5)

Why each option

A very faint but still visible laptop display is the classic symptom of a failed or failing backlight, where the image exists but lacks illumination.

AThe video card is failing.

A failing video card typically causes artifacts, color distortion, no signal, or system crashes rather than a uniformly faint image across the whole screen.

BThe display screen has been damaged.

Physical screen damage usually presents as cracks, dead pixels, or discoloration in a specific area, not a uniformly dim display.

CThe backlight has failed.Correct

The LCD panel itself still produces an image when the backlight fails, but without illumination the image is nearly invisible unless viewed in direct bright light or with a flashlight. This presents exactly as a faint, hard-to-read display, making backlight failure the most direct and likely cause of the described symptom.

DThe inverter is bad.

A bad inverter would also result in a dark screen, but the inverter's failure is a secondary cause - it causes the backlight to fail, so backlight failure is the more direct and precise answer.

Concept tested: Diagnosing laptop backlight failure symptoms

Source: https://www.comptia.org/certifications/a

Topics

#backlight failure#faint display#laptop display troubleshooting#LCD

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