QS 2002... SLEEP ISSUES NOT COME UP AFTER SLEEP PERIOD

QS 2002... SLEEP ISSUES NOT BOOTING UP AFTER A SLEEP PERIOD
Any ideas

I was thinking you could offer a little bit more detail.
If your Mac happily goes to sleep but won't wake up--Hold down the power switch to force-reboot your machine and get it running again.
Don't worry-your Mac isn't narcoleptic. Its Open Firmware system or NVRAM (nonvolatile RAM) is likely corrupt, and your Mac can't remember how to wake up.
Try resetting the PRAM. This should reset the NVRAM on most machines, which is the suggested fix. If that didn't help, do the following manually;
Restart your Mac and immediately hold down the Command-Option-O-F key combo until you see a somewhat intimidating command-line display that ends with the Open Fimware prompt. Type the following line:
reset-nvram
press the return key on your keyboard
set-defaults
press return
reset-all
press return
Your Mac will reboot. Once it's running, put it back to sleep to test. If the problem recurs your Energy Saver preferences may be the culprit. Delete the com.apple.PowerManagement.plist file (go to Finder/Hard drive/Library/Preferences/SystemConfiguration)--don't worry, your Mac will regenerate a new one--and then restart to see if that rights the wrong.
If you have a storage device mounted via a PCI card that doesn't support sleep read this Apple doc. Thanks Texas MacMan!
Still didn't work? Might be time to call AppleCare or see an Apple Genius or a technician.
 Good Luck! DALE

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