Often will not wake after extended sleep; PowerMac G5 Quad

Why is it that My G5 Quad has repeatedly refused to wake from a sleep?
when i leave it for a night, a few days, sometimes even a few hours, the machine will not wake. keyboard, mouse, all no response. even restart key combos, nothing. I end up doing a cold restart (holding down the power button). i hate doing that.
i've run hardware tests, nothing. Perhaps its a cooling/heating issue?
once, i did the cold restart and it froze up in the moment when the red light blinks and it shuts down. but that time the red light stayed on and the fans were all blaring. I had to pull the power cord out!
it seems to occur when i leave an application running that uses the internet. folding at home, mainly.
anyone know about this? do i have to send 'er in for some fixing?

If you're in a
very dusty environment, I've seen that cause clogging
of the fans/cooling system - otherwise, suspect RAM
first as noted.
I think you may be right. i just found the processor box thingy (next to the fans?) was almost 90% caked with dust. i busted out the handy vac and carefully vac'ed it clean. i made sure not to put the vacuum nozzle right up to the box, just skirting it a half-inch above.
I called applecare just now and went through some steps to remedy the sleeping crashes;
we booted from install dvd, ran disk utility "repair disk" no errors, hardware test said no errors on a recent test. we then booted to open firmware, reset three things rebooted with some key commands, three chimes, booted, unplugged the beast, replugged, rebooted, unpluged, pushed in the little power module button. now it seems even a bit smoother than before!
only thing was that pushing the little power reset button in there is subtle. you can't really feel that you've pushed it! the guy didn't tell me to be careful not to push it more than once until after i'd tried to push it maybe ten times. apparently you just touch it and it's done, but i thought it would pop or click or slide more, but i guess not?
hopefully that will resolve the sleeping crashes, i'll have to wait and see.
if it happens again, i'll take your advice and assume it's the ram. I won't swap them, because i'm a front-end guy. i was so scared to open the box just now, and imagine my peril when i realized i had to vacuum inside there!
If it happens again, I will take it in to an applestore, that way if it breaks i am not gonna get blamed.
THANK YOU BOTH!

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Mac will not wake up from sleep

I'm running 10,7,5 on 2x2.66 GHz Dual-Core Intel Xeon. The computer needs to restart because it will not wake after it sleeps. I've tried lots of different settings in the screen saver.
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.... and you fail to mention the model SSD and firmware version... or how you installed or cloned the system
most people also move most of their user folder to another hard drive.
sounds like a more normal Mail + OS issue if just that.
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2008 model 3,1 also are having a lot of issues this year. Including another critical piece, what gpu it has.

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Please read this whole message before doing anything. This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it. The purpose of this test is to determine whether your problem is caused by third-party system modifications that load automatically at startup or login. Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
Shut down your computer, wait 30 seconds, and then hold down the shift key while pressing the power button.
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http://support.apple.com/kb/HT4718?viewlocale=en_US&locale=en_US

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Hello:
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Will not wake up from sleep!!!

Toshiba Satellite C75D (part number: PSCLEU-003002, serial number: XXXXXXXXX.
Third one. I am trying to avoid taking this one back too.
I close the lid(sleep mode) and I go to bed. I wake up and open the lid, laptop will not wake up. I can close the lid for an hour, and it wakes up, but over night it will not.
All settings are as they come out of the box. I called tech support, and they changed the power saving settings. That had no effect.
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[Moderator edit to remove serial number.]

Yeah?.. Why didn't I think of that??? Well thats a novel idea! That's it !!! I could call Tech support again!!I've had them on the phone for 2 separate 1 hour sessions. I was hoping this forum may bring forth some answers other than calling tech support again.But thanks for the input.

IMac G5 iSight will not wake up from sleep

This has been happening to me for some time.
Occasionally my Mac do not wakes up from sleep. Instead it hangs!
Here how it goes:
I press a key on keyboard; my Mac wakes up, but screen remains black with only mouse pointer. I cannot see login window.
And Mac stays this way for hours. No matter if I press a key, click a mouse.
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Jul 31 21:43:36 snukec kernel[0]: System Sleep
Jul 31 21:43:36 snukec kernel[0]: IOBluetoothHCIController::restartShutdownWL this is a wake from sleep
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Jul 31 21:43:36 snukec kernel[0]: Wake event 0020
Jul 31 21:43:36 snukec kernel[0]: USB caused wake event (OHCI)
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Jul 31 21:43:38 snukec kernel[0]: UniNEnet::monitorLinkStatus - Link is up at 100 Mbps - Full Duplex
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Wait - before you take it in for repair or get put on hold with Support try this:
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NEW COMPUTER USING WINDOWS 7 WILL NOT WAKE UP FROM SLEEP MODE. I HAVE TO MANUALLY TURN IT OFF AND BACK ON.

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Hi, I would suggest you to check allow this device to wake the computer have a tick mark.
Here are the steps:
1. Click Start, type Device manager in the search box.
2. Go to Device manager.
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Follow the same procedure for mouse, restart the computer and check if it works properly.
I also suggest you to update your display drivers, you can logon to the manufacturers website and download the latest drivers and install.
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http://support.microsoft.com/kb/266283
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Here are the steps:
1. Open the Power troubleshooter by clicking the Start button, and then clicking Control Panel.
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3. Under System and Security, click Improve power usage.
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For more information, logon to:
http://windows.microsoft.com/en-US/windows7/Open-the-Power-troubleshooter
http://windows.microsoft.com/en-us/windows7/Sleep-and-hibernation-frequently-asked-questions
If the issue persists, please collect the Power Efficiency Report for further analysis.
Guided Help: Get a detailed Power Efficiency Diagnostics Report for your computer in
Windows 7
Regards,
Leo
Huang
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

HT203176 MacBook Pro will not wake up from sleep

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!http://i50.tinypic.com/izvwo1.gif!

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Hi,
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Please read this whole message before doing anything. This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it. The purpose of this test is to determine whether your problem is caused by third-party system modifications that load automatically at startup or login. Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
Shut down your computer, wait 30 seconds, and then hold down the shift key while pressing the power button.
When you see the gray Apple logo, release the shift key.
If you are prompted to log in, type your password, and then hold down the shift key again as you click Log in.
*Note: If FileVault is enabled under OS X 10.7 or later, or if a firmware password is set, or if the boot volume is a software RAID, you can’t boot in safe mode. Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs. The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. Test while in safe mode. Same problem? After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

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Hello,
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Often will not wake after extended sleep; PowerMac G5 Quad

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