How do I diagnose Windows XP failure to automatically suspend on idle?

Posted by Software Monkey on Super User See other posts from Super User or by Software Monkey
Published on 2010-04-17T05:49:40Z Indexed on 2010/04/17 5:54 UTC
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Windows

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suspend

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hibernate

Since upgrading my hardware (mobo, CPU and memory) a couple months ago my computer no longer automatically suspends and hibernates after the configured idle periods. Both functions work just fine manually, but if I leave the computer on overnight it's still active the next morning even though it's configured to sleep after 3 hours and hibernate after 6 hours.

How do I diagnose the cause of this?

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