[Beaver1]

Powerbook G4 running Mac OS 10.4.10- screen goes black suddenly.The only sure way to wake it up permanently is to disconnect power and battery, press power button for five seconds so it shuts down completely. Then I have to reset the date/time. I've tried repairing Disk Permissions but after a while the problem returns-which is a PAIN.

What do I do to fix it permanently please?

[Serge_N_Gin]

Originally Posted by Beaver1

Powerbook G4 running Mac OS 10.4.10- screen goes black suddenly.The only sure way to wake it up permanently is to disconnect power and battery, press power button for five seconds so it shuts down completely. Then I have to reset the date/time. I've tried repairing Disk Permissions but after a while the problem returns-which is a PAIN.

What do I do to fix it permanently please?

I found the following which mentions problems similiar to yours and the fixes that seemed to work:

Powerbook suddenly sleeps, will not wake up!

[Beaver1]

Thank you. I trashed the prefs.plist file in the System Config folder and this seems to have fixed the problem.

[Serge_N_Gin]

Glad to have helped out Beaver1 ...