4th let does not light up
I change the hard disk of my Imac
then I reassembled it, but the screen didnt turn on but when i pluged and external monitor it worked fine
i searched a bit on the web i found out about the 4 diag LEDs when i checked my MoBo only the bottom 3 LED work then top one doesnt light up
i though maybe i ripped the screen ribbon so i replaced it with other one but still the same problem
Is this a good question?