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iMac screen will not come on after sleep

iMac screen does not come on after sleeping for a period of time - twice now from overnight. The back seems to be warm. I have to hold the on button until I hear the drive and system shut down. Then after period of time it will start just fine. ?????

iMac, OS X Mountain Lion (10.8.2)

Posted on Dec 19, 2012 12:23 PM

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iMac screen will not come on after sleep

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