titanium hardware problem

[Carol Mullen]

Any suggestions on shutting down or restarting?

I'm running 10.2 on a G4 Powerbook.  I left it running during dinner.  It
was connected to the Internet through a Belkin router.  Now it won't wake,
and it won't shut down.  Even holding down the power button does nothing.
The only sign that it's not shut down is the white light.

It's not running on battery.

I'm using my old G3.

Carol Mullen