Manually putting imac to sleep not working

This just started happening tonight with no new programs or hardware added anytime recently. I tried putting my imac to sleep & it goes through it's motion just to pop back up again. I tried it several times & it keeps doing it! What's going on?

ibroker wrote:
This just started happening tonight with no new programs or hardware added anytime recently. I tried putting my imac to sleep & it goes through it's motion just to pop back up again. I tried it several times & it keeps doing it! What's going on?
What command or key combo are you using to put it to sleep?
Option-Command-Eject works for me. You have to hold the combo for about 1/2 second or more since the delay was put into the Eject key some time ago.

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