CPU won't go to sleep after timer

bok

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My iMac G4 won't go to sleep automatically after I did the Security Update 2005-009. Tried all the usual steps like repair permissions. Even used AppleJack. Manual sleep and wake works fine.

This is the first time it has ever happened - after getting the Security Update. One time, I left the keyboard and when I came back, the monitor went to sleep, the screen was all white! I thought it was just a glitch and didn't really notice if the cpu went to sleep as well. Now the monitor goes all dark as normal when the sleep timer kicks in. But then, the cpu doesn't go to sleep.

Any ideas?

Am running 10.4.3
 
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