My MacBook Pro does not sleep when it should

MacBook Pro is set to sleep at 11:00pm. Often it does not; occasionally it does. It is also set to sleep after a certain period of time, like 30 minutes. It never does.
10.6.8.
Any thoughts?

KJ38 wrote:
Apple recently replaced the logic board on my MacBook Pro mid 2010 17" due to panic kernels.  Since I got my computer back, the sleep indicator light does not work
Then they need to fix it again on their dime.  call them up, let them know and have them schedule a genius bar appointment for you.

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