How to repair VGA problems on laptop motherboard

hp g42 no display
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More about repair problems laptop motherboard
  1. Connect an external monitor and press the fn and f4 key. If the external monitor works the is a issue with you laptop's screen. Reoobt and try to use the laptop's screen and look at the screen from and angle, it you can see a faint image the invertor or backlight may have failed.
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