Chosen Solution
I have an old Macbook Pro that I use occasionally. I recently decided to tighten the hinge screws (I had done it successfully several times in the past) but this time my screen’s backlight was gone. I suspect this was because I accidentally plugged the battery back in and also touched the logic board with the LDVS cable, which gave off a little spark. When I looked at the LDVS cable, the black tip was clearly a bit burnt:
So I went and bought a new LDVS cable (A1278), but this hasn’t fixed the backlight issue. The Macbook works perfectly well with an external display however. I also did a flashlight test but I did not see anything on my desktop, so I don’t think I damaged the backlight fuse. Any suggestions? Here are some photos of the logic board:
Sadly I’m suspecting the logic board connector is damaged and/or the driver logic. Time to get your system to someone who has the deeper skills to fix your logic board or you could just replace it.
