Question about Apple Power Mac G4 Desktop

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Computer will not go into sleep mode

I have a Power MacG4 desktop computer with a Leopard Operating system. Periodically, it will not go to sleep, or, if it goes to sleep, turns back on automatically. Please advise. Thanks.

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  • Anonymous Mar 11, 2009

    Our MAC also won't go to sleep most of the time. Unpredictably, it sometimes does. It is a 933 MHz PowerPC G4 / 2 MB L3 cache running on OSX10.4.11. I've tried unplugging USB stuff, restarting, ensuring a charged motherboard battery, holding the PMU reset button for 30 seconds after a total power off and cable disconnect, a different keyboard and mouse, with and without Bluetooth - nothing helps. It just sometimes goes to sleep and sometimes does not. Local technician is willing to try to help but admits it is a complex situation with a small chance he can duplicate, identify and fix. I can understand when something stops working because it is worn out or breaks. But this is intermittent and seemingly unpredictable. An online search suggests it is a known problem.

  • hstern372
    hstern372 Dec 08, 2012

    please reset the PRAM by holding down the command, option, the P and the R keys while starting up your eMac, and let it chime 2 times. Then let go of the keys.Good luck!


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Please reset the PRAM by holding down the command, option, the P and the R keys while starting up your eMac, and let it chime 2 times. Then let go of the keys.Good luck!

Posted on Dec 08, 2012

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External drives (hard drive, DVD burner, iPod, USB drive), printer, a worn out mouse button, debris in/on the keyboard, and cats are all things that can cause your computer to refuse to sleep (or wake it shortly thereafter).  Rule out these first.  I have had the same problem in the past.  It is almost always one of these that causes the problem.

Posted on Mar 01, 2009

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