Chosen Solution
I have replaced the logic board on my imac (previous question), it seems to work but after ca 5 minutes the screen goes black. When I restart, the same problem after 2-3 minutes. What could be the reason?
Hi Tony, Seems like there’s some sort of incompatibility or fault. Judging by the fact you did a logic board swap it seems you have the tools for these imac repairs. When this issue occurs, can you shine a flashlight on it to see if theres any image. If so then the backlight connector is not seated properly If not, try a power cycle (If u don’t know how to do that either i or someone else can explain) As a last resort try and swap the boards out again and see if the issue continues. If so then something is clearly damaged hardware-wise and needs replacement. My guess is the display cable is somehow being interfered with.
