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Oct 20, 2013 8:55 AM in response to Klaus1by TVGUY47,Thanks, but the computer starts, & I do get the gray screen, but it doesnt go any further. The link you sent is for no start, no screen, no fan.....
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Oct 20, 2013 10:22 AM in response to TVGUY47by Klaus1,Does the pram battery still work - have you tried replacing it?
When did it last start up?
Resetting the SMU on a G5 iMac:
http://support.apple.com/kb/HT1767
and on resetting the PMU on a Power Mac G5, G4 and G3 :
http://support.apple.com/kb/HT1939?viewlocale=en_US