Problems with sleep mode in 10.4.7

I recently upgraded to OS 10.4.7 and now the sleep mode doesn't work like it used to. On all other versions of the OS, i'd put the computer to sleep and whenever I wanted to start it up again I'd wiggle the mouse or hit any key on the keyboard. Now, neither of those work. The system goes into sleep mode as usual, but the only way to wake it is by hitting the power button on the tower. Is this an OS bug? Is there a fix? Any help is appreciated. Thanks.
G4 MDD 1.42 Dual, 1.5GB RAM, 4 Hard drives (1 system, 1 media, 1 render, 1 elements) Mac OS X (10.4.7)

If your Mac happily goes to sleep but won't wake up--Hold down the power switch to force-reboot your machine and get it running again.
Don't worry-your Mac isn't narcoleptic. Its Open Firmware system or NVRAM (nonvolatile RAM) is likely corrupt, and your Mac can't remember how to wake up.
Restart your Mac and immediately hold down the Command-Option-O-F key combo until you see a somewhat intimidating command-line display that ends with the Open Fimware prompt. Type the following line:
reset-nvram
press the return key on your keyboard
set-defaults
press return
reset-all
press return
Your Mac will reboot. Once it's running, put it back to sleep to test. If the problem recurs your Energy Saver preferences may be the culprit. Delete the com.apple.PowerManagement.plist file (go to Finder/Hard drive/Library/Preferences/SystemConfiguration)--don't worry, your Mac will regenerate a new one--and then restart to see if that rights the wrong.
Still did'nt work? Might be time to call AppleCare or see an Apple Genius or a technician.
Cheers!
DALE

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Log a bug with Apple, with whatever details you can provide. In the interrim, consider acquiring a router; either a repurposed x86 box running open-source networking or gateway software, or a commercial device.

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Before you continue to wait for solution and waste your time back-up all your important data and reinstall OS again using HDD recovery installation - http://aps2.toshiba-tro.de/kb0/HTD1303440001R01.htm
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Hi,
Have you check you settings in Power Manager. If you start it, switch to advanced mode and check inactivity settings for the power profile you are using you will find that you can set times for shutting down certain things. Look if you have things set to shutdown after 5 minutes.
The obvious suspect would be that you have set the machine to hibernate after 5 minutes (although this seems very short). Once you have found the "suspect" change the time to verify that this is what causes the problem.
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It's me again, in last thread :
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EletricB,
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https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/7086f109-aaa7-2a10-0cb5-f69bd2affd2b
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/2498bf90-0201-0010-4884-83568752a857
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/cc1ec146-0a01-0010-90a9-b1df1d2f346f
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Problems with sleep mode in 10.4.7

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