Currently Being ModeratedApr 7, 2012 8:01 AM (in response to darwinfromdetroitlakes)
A failing power supply is the reason.
Currently Being ModeratedApr 7, 2012 9:56 AM (in response to darwinfromdetroitlakes)
First try a PMU reset See How to reset the SMU/PMU on a Power Mac Earlier G3, G4, G5 models...
Your internal PRAM battery may be weak or discharged. Suggest you replace the battery. Check this site for battery part numbers and sources. https://sites.google.com/site/macpram/mac-pram-nvram-cuda-pmu-battery-tutorial Mac PRAM, NVRAM, CUDA/PMU & Battery Tutorial
Currently Being ModeratedSep 17, 2012 5:34 PM (in response to darwinfromdetroitlakes)
Resetting the PMU button worked for me (G4 with mirrored doors). The computer is easy to open and the button easy to find. Yay (for now)!
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