HT1939: Resetting PMU on Power Mac G5, Power Mac G4, Power Macintosh G3Learn about Resetting PMU on Power Mac G5, Power Mac G4, Power Macintosh G3
Currently Being ModeratedJun 11, 2013 10:31 AM (in response to lynn169)
Might be time to replace the PRAM Battery, 4 years is close to their lifespan, far less if ever without AC power, & can cause strange startup problems...
See which one your G5 has...
How to reset the SMU/PMU on a Power Mac G5 (Late 2004) or Power Mac G5 (Late 2005) ...
Earlier G3, G4, G5 models...
Currently Being ModeratedJun 11, 2013 3:55 PM (in response to lynn169)
Troubleshooting: My computer won't turn on
Resetting the Logic Board
Resetting the logic board can resolve many system problems. Whenever you have a
unit that fails to power up, you should follow this procedure
before replacing any modules.
1 Unplug the computer.
2 Press the Power On button on the front of the unit.
3 Open the side access panel.
4 Remove the battery from the logic board.
5 Wait at least 10 minutes before replacing the battery.
6 Make sure the battery is installed in the correct +/-
7 Reassemble the computer and test the unit.
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