2 Not starting and Logic board debug
My a1347 Mac Mini has been turned off for a few years and now it will not start. When I press the power button the fan goes on for a second, the light goes on for about a second too and it makes some sort of sound. The sound is not the fan as I also hear it with the fan disconnected and I have some distant memory of that the sound always there on start.
I have checked that the power supply gives 11.8V on all 4 pairs as of this guide so it appears to not be the problem. Complete Dead - How To Check Power Supply Vs Logic Board
So now I am rightly of wrongly looking at the logic board. I have read in a few other forums of failing capacitors near the power supply on Macs. Can someone point out where in the photos these might be? Other ideas of where/what to check and how are also appreciated.
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Did you replace the NVRAM coin battery?
Dan tarafından
No but I measured it to be under 3V. Is that enough voltage?
Alpaca tarafından
If the system had been sitting unplugged it will need replacing. I would start there.
Dan tarafından
I changed the old battery (2.9V measured) to a new one (3.3V measured) but it didn't help. Still the same when starting the Mac Mini. Any other ideas?
Alpaca tarafından
So can anyone point where the capacitors are on the logic board that are related to the power supply?
Alpaca tarafından
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