Practice Quiz

CompTIA A+ 220-901

Category - Mobile Devices

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A user calls the help desk complaining that their laptop’s display is suddenly not working properly. The user can see the Windows desktop on the laptop display, although it is very dim. What is the most likely cause of the problem?
  1. The display drivers need to be reinstalled.
  2. The laptop’s inverter board is faulty.
  3. The cable connecting the display to the motherboard is faulty.
  4. The graphics card is faulty.
Explanation
Answer: B - If a user complains of a dim laptop display, the most likely cause of the problem is a faulty inverter board.

Key Takeaway: The inverter board is responsible for powering the laptop display’s backlight. Since the user can make out a dim image on the screen, data is traveling from the graphics card through the cables. Although the display drivers may be faulty, it is unlikely they would suddenly become corrupted, and that they would still result in a clear (albeit dim) image.
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