I was working all this morning no problem. I left for 20 minutes to take the dog for a walk and I come back to my powerbook G4 shut down. The caps lock and the num lock leds are lit up and will not turn off. I can not power my machine up at all. The machine had a full battery and was plugged into the power supply while I was gone. Anyone have an idea of what could have happened. I have unplugged the machine from the power supply and removed the battery. Tried to power up with only the battery and only the power supply. The leds are still lit up . The num lock flickers when plugged into the power supply. I have tried resetting the computer. Everything. I am at a loss. I would greatly appreciate any help anyone can give me. I am lost without this machine.

Try leaving the battery out and the PSU disconnected for about an hour. p

I experience the same problem with the LED's lighting up but no boot process when a memory module came loose on my G3 laptop. I opened it up, reseated the memory block securely and it booted normally afterwards.