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Got my hands on an old G$ Cube. It was missing RAM and a HD and a power supply, but I got those parts, threw them together and booted it up...and got this flashing on the power light:

YouTube - G4 Cube flashing error

I've looked and saw what two blinks and three blinks mean, but haven't found what this means. Anyone know? I'd appreciate it.

I don't know where the PMU switch is, but try that first. But I have seen that blink in PowerMac G4 towers and it may not be a simple fix, out of warranty that is.

Thanks for the reply. Replaced the battery and reset the CUDA, no dice.