220-802 · Question #583
A laptop boots fine but after a few minutes the LCD screen fades out into a very dim image. Which of the following is the cause of the problem?
The correct answer is D. LCD inverter is failing. The LCD inverter is responsible for powering the backlight (CCFL lamp) that illuminates the screen. When the inverter begins to fail, it often works initially but loses the ability to sustain power to the backlight over time, causing the screen to gradually fade to a very dim…
Question
A laptop boots fine but after a few minutes the LCD screen fades out into a very dim image. Which of the following is the cause of the problem?
Options
- AWeak battery
- BPower supply is failing
- CLCD screen connector is loose
- DLCD inverter is failing
How the community answered
(45 responses)- A9% (4)
- B2% (1)
- C2% (1)
- D87% (39)
Explanation
The LCD inverter is responsible for powering the backlight (CCFL lamp) that illuminates the screen. When the inverter begins to fail, it often works initially but loses the ability to sustain power to the backlight over time, causing the screen to gradually fade to a very dim or barely visible image. The content is still there - you can often see it faintly - because the LCD panel itself is functional. A weak battery (A) would cause the entire system to shut down or throttle performance, not just dim the screen progressively. A failing power supply (B) on a laptop typically causes erratic shutdowns or charging issues. A loose LCD connector (C) would more likely cause flickering, complete signal loss, or intermittent blackouts, not a consistent gradual fade.
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