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When I turn on my HP Pavilion DV6 it starts normally. Windows (win7) is loaded and a few seconds after that the screen fades. It doesn't go completely black, it fades to 99% black. External monitor plugged in works normally.

What I have done so far is:

  1. Installed Linux on the laptop. The same problem
  2. Installed Win 7 32b again, installed all updates + latest drivers. The same problem
  3. Entered BIOS and restored to default settings. The same problem
  4. Updated BIOS from ver. 14 to 18. The same problem
  5. Run diagnostic tools. In the BIOS diagnostic log, there is error 0106 repeating many times. Couldn't find what it means.
  6. Removed the battery. The same problem

I noted that when going into BIOS the screen fades as well, and as it is the same with Linux, I think the problem cannot be drivers, updates or OS related. Another thing is that when I toggle windows button + 'P' and set it to projector only, the screens turns completely black (as it should) and when I set it to 'duplicate screen' the laptop screen starts working again for a couple of seconds and fades to 99% black again.

Why is this happening?

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+1 Good job describing what you've already done to try to troubleshoot this problem. –  CharlieRB Dec 7 '12 at 12:10
    
It sounds like it could be the backlight going. Unfortunately there's no easy way to test it unless you know someone with the same model who wouldn't mind you swapping the screens over. –  Miles Hayler Dec 7 '12 at 12:22
    
Hmm I know a guy with another model HP laptop, the motherboard is dead. It is a 17 inches, but might worth trying to connect his monitor (if it has the same plugs) and isolate the problem. Good idea, I will try on monday and will come back. Have a nice weekend –  Geparez Dec 7 '12 at 12:54
    
No luck, totally different plugs .... –  Geparez Dec 11 '12 at 12:04
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1 Answer

You've pretty much isolated it to being a hardware issue. Because you said this happens in BIOS, Windows 7, Linux and an external monitor works normally, I am inclined to believe the graphics adapter is good, but the LCD and/or it's components (back-light, inverter, etc) are starting to fail.

Not sure which diagnostic tools you ran, but you may want to try running HP's Support Assistant which gives you specific categories to troubleshoot and can help you find the problem.

enter image description here

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thanks for promt reply, downloading now. Hopefully it will show something. –  Geparez Dec 7 '12 at 12:48
    
no luck, it doesn't find any problem :( –  Geparez Dec 11 '12 at 12:04
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