After Mountain Lion installed, 27" late 2009 iMac won't sleep

As the title says.....
Worked fine since new, but with Mountain Lion, it won't auto sleep. I have a numbe of iProducts, but only this one isn't working. Energy saver settings are fine.
Desired behavior is after a few minutes the screen goes dark, then spool down after 15min, but it never happens. It will sleep if I hit the power button.

trying a clone after all due to this discussion https://discussions.apple.com/message/20938457#20938457

Similar Messages

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