Answer to: Why is my iMac G4 not powering up (after a power outage)?I have the same issue with my Power Mac G4 (Quicksilver). After a blown circuit breaker I have no power. I've tried replacing the power supply and the logic board (a used part, as I can't see investing in a new one) but still no power. I don't know what else to do. I'll probably just buy a new iMac but I'd still like to get my G4 running again.