white screen problem - tried several things already

publiusdiamond

New Member
Hi all

I've dug out my girlfriend's old laptop, which she said was broken. I turned it on and got a white screen. This seems to be a common problem with a lot of laptops and is usually put down to a faulty screen. I opened it up and saw the screen harness cable had been worn so much - one of the hinges was broken and putting pressure on the cable, they were all frayed - so I ordered a new one and put it in.

No change.

Plugging an external monitor in works fine and I was able to get into Windows and salvage all the files etc.

I picked up a new screen from ebay (seller said it was tested and worked). I've just plugged that in and I still have the same problem.

My question now is, is it definitely the motherboard here that is the problem, even though an external display works fine? The only other thing I think it could be is a faulty inverter, BUT, I can change the screen brightness with the function key and it works fine on the white screen. Could it be half-working?
 
Just an idea, but it could be a bad connection at the motherboard side of the cable. Would generally say GPU also, but if it works externally then you have rules that out as well as the RAM.
 
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