No diagnostic LED, is PSU dead?
I Have a 2017 imac 21.5”, won’t turn on at all, no drives, no fans, nothing.
I have taken the screen off and there are no diagnostic LEDs coming on at all.
I have measured the voltages on the PSU as follows (all wrt the upper most pin on the larger connector:
[larger connector]
v ref
0v
0v
12.1v
12.1v
12.1v
[smaller connector]
3.32v
0v
0.01v
0.02v
0v
0v
does this indicate a dead PSU? I’m hoping it’s the PSU rather than the logic board!
Ist dies eine gute Frage?
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