No backlight or image
So i got this Macbook from my brother. Macbook Pro A1990 15 Inch. I got neither backlight or image on the screen.
No history of liquid spills or anything. It's fully functional on external monitor - and the webcam works.. But i doesn't seem like the internal display is even detected.
I've tried using a known working LCD panel and still no image. I guess it must be a logicboard/cable thing.
When i try booting into recovery-mode, i sometimes get working backlight on the LCD. But nothing else.
Also tried with a fresh installation of OSX. Still noting. It's a bit weird i think.
I see no indications of shorts or anything after visual inspection with a microscope.
I also get the correct voltages on pins 43/44 and 45/46 in the J8500 display connector.
Any ideas? Thank you