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Old 27th Sep 2020, 2:37 pm   #14
cathoderay57
Nonode
 
Join Date: Oct 2017
Location: Bristol, UK.
Posts: 2,364
Default Re: Acbel API1PC36 from an old Mac

I checked all of the voltage rails at the motherboard and no shorts. And then, well, it's a weird one. I changed 12 of the electrolytics before lunch, and did a quick check run. The symptoms were exactly the same - fan twitch, a red LED on the motherboard (D518) flashed once and nothing else happened. So I had lunch and before changing any more components I did another check run. The darn thing started and ran for 5 seconds. Two more restarts and it kept running. Why that should be the case I have no idea. There is a backup battery on the motherboard that currently tests as 3.65v, so I guess that can't have been a problem.
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