No power but PSU is fine
So I'm trying to fix my iMac 21.5" late 2012 (EMC2544/A1418)
There is no response from the power button, no fans, no screen light up, no beeps, nothing. So basically it won't turn on.
First off, none of the diagnostic LEDs light up.
- There is 12v measured on the logic board where the PSU plugs in.
- There is 3v measured on the logic board where the PSU plugs in.
- Coin cell voltage is 2.78v with computer unplugged.
- I have tried resetting the real time clock.
When I hold the power button in and plug the power in trying to force it to turn the fans on into high power mode, nothing happens.
Anyone have any ideas? Seems like a fault on the logic board, but I'm not going to buy a new one. I'm hoping there is something simple that I've overlooked.