IMAC G5 shuts off by itself without showing any errors

My Imac G5 will shut off when it is left in the sleep mode for 2 or more hours. The system will come back on when turned back on and does not show any errors. Everything seems to be running great except for the fact it shuts off by itself. Please Help!!!!!!!

Hello! See if this Apple Doc applies to your computer. Tom
AutoShutdown

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    Take the back off and check out the LEDs using the instructions [here|http://docs.info.apple.com/article.html?artnum=300908].

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  • Imac shuts off by itself

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    You are correct as I tried that and still have the problem.  I did the pmset -g in termal you suggest and here is mine.  This original post is my exact problem that has driven me crazy for far to long.  Can you help WZZZ?
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    Sleep On Power Button 1
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    halfdim              1
    hibernatefile        /var/vm/sleepimage
    darkwakes            0
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    networkoversleep     0
    disksleep            10
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    ttyskeepawake        1
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    Hello,
    Get Temperature Monitor to see if it's heat related...
    http://www.macupdate.com/info.php/id/12381/temperature-monitor
    iStat Menus...
    http://bjango.com/mac/istatmenus/
    And/or iStat Pro...
    http://www.islayer.com/apps/istatpro/
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    Dr. Smoke
    Author: Troubleshooting Mac® OS X
    Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
    I may receive some form of compensation, financial or otherwise, from my recommendation or link.

  • My 27inch iMac automatically shuts off

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    Restore it in iTunes.

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    IIf the battery was completely drained it might take some time before the phone will respond. Wait at least 30 minutes with the phone connected to the charger. Then reset your device. Press and hold the Home and Sleep buttons simultaneously until the Apple logo appears. Let go of the buttons and let the device restart. If the phone starts up let it continue to charge until it's 100%.
    if the broken button will not let you do the reset Make an appointment at an Apple Store to have your device examined by a technician. Or contact Apple Support.

  • Has any one figured out how to fix an issue I'm having. My iPhone 5 randomly shuts off by itself. Then it won't turn on when i try to hook it up to iTunes it says its in recovery mode. so then i hit restore and its been stuck on waiting for iPhone.

    This happened after I did a software update on my phone about a month and a half ago. My phone will randomly shut off by itself and wont come back on. I had spoke with an apple repair person over the phone who told me to hold in the home button and then plug it into my computer. When the iphone said that there was an error and gave him a code he suggested that I send it in. So I did and about a week and a half later I get it back and its on. Yet the problem still occurs. It shut off twice in the same day and for several hours would not come on. When it did I called apple again and they ran a diagnostic on my phone and said it was a software issue. So then why was it not fixed? They told me they could not duplicate the problem. And now it happens about once or twice a week now. And its happening right now. I have it plugged into my computer and the apple logo with a bar below it has been on for about 20 min now. And itunes is still saying "waiting for iphone." 

    Hello Elliiee,
    The steps detailed below can help stabilize your iPhone.
    Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
    Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion. Learn about LCIsand corrosion.
    Connect the iPhone to the iPhone's USB power adapter and let it charge for at least ten minutes.
    After at least 30 minutes, if:
    The home screen appears: The iPhone should be working. Update to the latest version of iOS if necessary. Continue charging it until it is completely charged and you see this battery icon in the upper-right corner of the screen . Then unplug the phone from power. If it immediately turns off, seek service.
    The low-battery image appears, even after the phone has charged for at least 20 minutes: See "iPhone displays the low-battery image and is unresponsive" symptom in this article.
    Something other than the Home screen or Low Battery image appears, continue with this article for further troubleshooting steps.
    If the iPhone did not turn on, reset it while connected to the iPhone USB power adapter.Connect the iPhone to a computer and open iTunes. If iTunes recognizes the iPhone and indicates that it is in recovery mode, attempt to restore the iPhone. If the iPhone doesn't appear in iTunes or if you have difficulties in restoring the iPhone, see this article for further assistance.
    If the display turns on, go to step 4.
    If the display remains black, go to next step.
    If restoring the iPhone resolved the issue, go to step 4. If restoring the iPhone did not solve the issue, seek service.
    My issue is still not resolved. What do I do next?
    Contact Apple Support.
    iPhone: Hardware troubleshooting
    http://support.apple.com/kb/TS2802
    Cheers,
    Allen

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