Powerbook lights wont work


How can I fix this?
My powerbook G4 17" lights wont turn on and the monitor is completely blank. This happened after a force reboot.
I have done the PRAM and the PMU resets, it still wont work. The startup sound plays fine, fans start up.. cant eject, not sure if it's sleeping the light wont turn on, the power button either..

THis is my only source of support.. no applecare.

Monitor wont turn on when trying to boot to a linux live cd.. cant eject.