Imac 27 2011 sometimes no power


New member
This iMac sometimes not power. When I plug to 230V 1 led is on. When press power sometimes iMac power and all leds are on and sometimes first led power off and iMac will not power. Already replaced the power board and same problem. COuld be some short in GPU or most time is board issue?


If the first LED goes off it means the PSU is shutting down. Assuming you already replaced the PSU there is probably an intermittent short on the board. This is pretty much impossible to diagnose. If it powers on see if you can find anything that does not work that may cause this issue.