iMac not sleeping

Question

Level 1

5 points

iMac not sleeping

Hi

I have an Intel iMac (White) 17", that won't go to sleep on its Energy Saver time settings. I have the display and computer set to sleep after 15 minutes and put the hard drives to sleep. This does not happen. The display goes black and the power light stays on continuously and does not pulse.

If i set the computer to sleep manually by going to  -> Sleep, then it sleeps fine (power light pulses).

I've reset the PRAM and this doesn't make any difference. The only things plugged in are a keyboard (aluminium) and wired mighty mouse plugged into the keyboard, with a USB hub plugged into the actual machine.

If i take the hub out, it doesn't make any difference.

Do you have any ideas on what is causing this? I have applecare and am considering taking it to the store, if its a logic board issue...

Thanks

Joe

Intel iMac 2GB RAM, 1.83GHz CD, Intel MacBook 2.4GHz C2D, 4GB RAM, Mac OS X (10.5.5)

Posted on Jul 1, 2009 11:38 AM

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Answer 1

den.thed

Level 10

92,932 points

Jul 1, 2009 5:16 PM in response to Joe Coyle

Hey Joe

First reset the SMC > http://support.apple.com/kb/HT1543

Then if it won't sleep > http://support.apple.com/kb/HT1776

Dennis

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Answer 2

Jul 1, 2009 6:41 PM in response to Joe Coyle

HI Joe,

Check System Preferences/Energy Saver and click Options. Deselect Wake for Ethernet network administrator access if it pertains to this problem.

Carolyn 🙂

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Answer 3

Jul 16, 2009 2:49 PM in response to Joe Coyle

I have the exact same problem. I have a 2006 20" intel iMac. I have done the same thing as the user in this post. I have resorted to simply using the manual sleep function and being at peace with that. At least the display sleeps automatically when I set it to. I am open to any suggestions.

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Answer 4

Joe Coyle Author

Level 1

5 points

Jul 16, 2009 3:03 PM in response to bradster1

Hi

I took my iMac down to my local Apple Store, where the genius booted it off a Leopard hard drive. The machine went to sleep fine, so she told me to do an Archive and Install which i did at home. This fixed the problem and now it goes to sleep automatically.

Hope this helps.

Joe

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Answer 5

Joe Coyle Author

Level 1

5 points

Jul 16, 2009 3:04 PM in response to Joe Coyle

Archive and Install fixed the sleep problem.

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