Mac Pro does not sleep

I agree with Satcomer on this last post, update to the 10.4.11 Combo and or back up your system and do a clean install.

I've had sleep issues in the past but with a clean install of 10.4.9 then immediately updating with the above update, i've resolved the issue. If unsuccessful, then yes take it back to the Apple store.

Best of luck.
 
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