My powerbook G4 12" wont wake up after sleep anymore all the time!

Hi there
I've got a problem with my 12 " pb. quite often it wont wake up anymore after sleeping mode. I then press the "p", "r", comand, and "alt" together with the power button and usually that works. sometimes I need to do that 3 or more times untill it finally starts up again. I ran the hardware test, repaired everything I could but it still does it and I cannot figure out why.
Do you have any ideas what could cause this problem and if so what I could do to solve it?
Thank you very much

Luca:
If you leave your computer on all the time and allow it to sleep instead of shutting it down, you should completely shut it down every now and then (I do this weekly) and then start up in Safe Mode, log in, empty Trash and Restart normally and log in.
Let me know if this helps.
Cheers
cornelius
Message was edited by: cornelius

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{Content Removed}

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My powerbook G4 12" wont wake up after sleep anymore all the time!

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