68kMLA Classic Interface

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G4 Quicksilver PSU repair
Posted by: davidg5678 on 2026-03-20 15:10:22 Hi all! Has anyone here worked on the SMPS for a G4 Quicksilver? I've got one on the bench that seems to be failing to start up. It sort of pulses on and then off and is probably entering a protection mode. I've got a general book on SMPS repair that I'm reading, and will soon use it to apply more general diagnostics to the thing. If anyone is inspired to do something similar, you should know that safety precautions are needed to do this without getting hurt. I think it's extremely likely the capacitors in the secondary side have gone bad... Anyhow, if anyone here has fixed one of these and has some anecdotal knowledge to share, that would be very helpful! There's not much about fixing these guys on the web. I know I could do an easy ATX mod, but that's not something I'm interested in right now. Otherwise, I'll try to keep folks here updated as I tinker and hopefully fix the PSU myself!
Posted by: herd on 2026-03-20 15:21:06 I think it's extremely likely the capacitors in the secondary side have gone bad.. I agree. I've repaired several by replacing caps. Good luck and let us know how it goes!
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