Not waking up after recent patches

Question

I've been using my new iMac for over a month now, and it's wonderful.
One of the things I loved was that the sleep actually worked compared to my Windows machines.
Well after the last patches (iTunes and two other patches) that required a reboot, my iMac is behaving weird when I try to wake it up from sleep.
Going to sleep works fine, but when I try to wake it up, either using the mouse, keyboard, power switch or the remote, it acts like something has turned on (the sleep light goes out) but the screen never comes on.
Hitting keyboard functions doesn't do anything (i.e. I hear no click when changing the volume, disc eject doesn't work) and I've read the other posts about issues with USB devices, so I unplugged everything except my keyboard and mouse, but still the same results.
I REALLY liked having it sleep correctly, and I hope someone can tell me how to either fix it, or back out the patches from last week which seem to have triggered this.
Thanks

Answer 1

Welcome to Discussions!
First, check that your firmware is up to date: http://docs.info.apple.com/article.html?artnum=303903
If so, typically your resolution should be either of these two:
SMC reset - this is simple, no risk, and should be repeated if not successful the first try. Many have reported using that a somewhat longer time period helped, but I think it's just a matter of the more tries the more chance of success:)
or
PRAM reset - simple, once is enough. A good real-time check on whether you've done it right: first set your iMac's sound level high or low and then listen to the sound level of the startup chord that sounds during the reset in comparison - the PRAM reset if successfull will reset the sound level to the default (mid-point).
To reset the PRAM:
1. Shut down the computer.
2. Locate the following four keys on the keyboard: Command (Apple logo), option, P, and R. You will need to hold these four keys down simultaneously in step 4.
3. Start up the computer.
4. Press and hold the Command-option-P-R keys. You must press this key combination after the startup chord sounds, but before the gray screen appears.
5. Hold all four keys down until the computer restarts and you hear the startup chord for the second time.
6. Release the keys.
Message was edited by: myhighway