PowerBook G4 crashes in sleep mode

B

BParis

Registered
Hi,
I've a problem with my PowerBook G4 (12-inch DVI and Mac OS X 10.4.11). When I close the lid or when I manually try to make it sleep from the apple menu, it goes into sleep mode put only for 1 second and then shuts off (crashes). So instead of being able to wake up the computer, I have to boot it up from off.

Can anyone help me with this problem ?
Thanks in advance for the help !
 
Do you mean completley off, or when you open it back up again, you have to push the power button and boot back up?
Try a PRAM, And NVRAM Reset
 
Thank you for your answer.

Yes, when I close the lid, my PowerBook is completly off.
I tried to reset the PMU, the PRAM and the NVRAM. Unfortunately ... nothing changed.
 
Have you checked your Energy options?

System Preferences>Energy Saver.

I don't think thats your problem though, Maybe you need to actually change your PMU battery.
 
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