Ibook will not shut down or restart

my g3 will not restart or shut off when prompted from the finder menu. it will turn off when i hold down the power button for ten seconds as recommended. i tried resetting the PMU but still no luck.please help!

I suspect that it might be software related... That could be isolated by booting from the install CD and see if the shutdown from it works. Also, I had a ibook that had the bad video memory problem that still ran fine otherwise, so I have made it a headless compute engine... so I do not have a window to click on shutdown.... therefore I use the admin user account and the terminal to issue the system command halt
given the prompt just type halt
halt
that should work for you as well and lead to a graceful shutdown.
At least you would know if it is software or hardware
JWC / accesstospace

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