iMac lights up but no display or sound. Shows sign of life. Help?
I have a iMac that powers on which shows there is sign of life however the white light remains and no display or sound. What could be wrong?
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I've had this problem myself, it can be a bad display connection or RAM not being seated correctly.
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Do you see any glow in the display in a darkened room?
Does the system Bong and/or hear the fan when you start the system?
Did you try replacing the PRAM battery? iMac Intel 24" EMC 2111 PRAM Battery Replacement
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