So I’ve got these two IIsi projects, and the PSU for one of them is giving me issues.
I recapped them both; one works fine. The other seems to have an issue with the soft power circuit. It won’t turn on - re-seated the new caps on the daughterboard, and it turned on once but when I shut down gave me the “it is now safe to turn off your Macintosh” screen, which indicates soft power failed again some time in those two minutes.
I’ve got the circuit diagram for the psu from somewhere but I’m not good at reading these. So I’ll keep trying to figure out what to look for but any tips or ideas would be appreciated.
Also a couple of the solder pads on the PSU board are lifted, including one of the pads for the SP daughter board. The component and solder are keeping them in place and they’re not broken (continuity from the pad to the next component in the circuit is good) nor are there any solder bridges I can spot with a continuity tester. But could that be causing my issues?
I recapped them both; one works fine. The other seems to have an issue with the soft power circuit. It won’t turn on - re-seated the new caps on the daughterboard, and it turned on once but when I shut down gave me the “it is now safe to turn off your Macintosh” screen, which indicates soft power failed again some time in those two minutes.
I’ve got the circuit diagram for the psu from somewhere but I’m not good at reading these. So I’ll keep trying to figure out what to look for but any tips or ideas would be appreciated.
Also a couple of the solder pads on the PSU board are lifted, including one of the pads for the SP daughter board. The component and solder are keeping them in place and they’re not broken (continuity from the pad to the next component in the circuit is good) nor are there any solder bridges I can spot with a continuity tester. But could that be causing my issues?
