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All replies
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Helpful answers
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Jun 2, 2012 4:34 PM in response to lewis02116by BDAqua,Remove al peripherals, power, printer, Mouse, KB, everything, wait a few hours &...
How to reset the SMU/PMU on a Power Mac earlier G3, G4, G5 models...
http://support.apple.com/kb/HT1939
Plug everything back in, try to start it.
Is there a red LED lit up on the Logic board?
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Jun 3, 2012 2:56 PM in response to BDAquaby lewis02116,Thanks for the suggestion. I reset the PMU according to Apple's instructions. Didn't help. I don't see a red LED on the logic board.
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Jun 3, 2012 3:54 PM in response to lewis02116by BDAqua,Then likely your Power Supply has gone out.
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Jun 3, 2012 5:57 PM in response to lewis02116by BDAqua,Sorry, if you have a Multi-meter & a little skill...
http://www.allpinouts.org/index.php/Power_Mac_G4_Mainboard_Power_Supply