iMac won’t turn on, only first diag. LED turns on
I’ve just had my iMac’s GPU reballing done, and after reassembling the system, when I press the power button I can hear the fans and hard drive spinning, however, no startup chime or image displayed. Only the first diagnostic LED is on. I have already tried using different RAM sticks as well as an external display. Any ideas on what can it be?
Is this a good question?