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IMac Intel :: 24" Won't Restart Unless Unplugged For Four Hours


After refusing to awake even with PMU reset (no chime, nothing) from "Sleep Mode", Apple Tech Support "hardware problem" and sent me to Apple Store last Tuesday where Genius found nothing as unit turned on after being unplugged overnight; he ran diagnostic but found again no hardware / hard disk problems; an electrical power failure may have caused initial problem. I purchased a UPS (550 watt) and reinstalled iMac. Unit started up (chime, OPTION-CONTROL-P-R reset); then tested and successfully restarted from RESTART or SHUT DOWN but failed to restart from SLEEP mode. Unplugged overnight restarted successfully (chime, OPTION-CONTROL-P-R reset), used for four hours, then SHUT DOWN but did not unplug. Did not restart (no chime, nothing) this morning. Now unplugged, will try to start again in four hours.

Information:
iMac 24" Intel November 2007
Mac OS X (10.5)
Closest Apple Store is 85 miles away


View 1 Replies (Posted: Aug 6, 2009)

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