iMac is dead.
I tested the power supply separately from the logic board and all the pins match the expected amounts. When I attach it to the logic board, all the pins are dead, zero volts everywhere.
Q: Does this mean there’s a short on the logic board? Wouldn’t the pins still show a voltage since the short is drawing power?
Q: Do I need to supply voltage to the board to find the short?
좋은 질문 입니까?
평판: 480.2k
35
329
971
Yes, you have a short within the logic board, often it’s the MXM GPU board that fails.
Time to pullout the DVM and check the power rails for a short (without the power supply connected). You’ll need the board-views and schematics for the system.
해당 답변은 도움이 되었습니까?
DVM? Digital voltmeter, right? (Just checking) ;)
Also, can I assume that the power supply is prob OK?
@Paul Spinelli - Likely, you really need to test the logic board power rails for a short
24 시간 전: 0
7일 전: 3
30일 전: 12
전체 시간: 53
