It has been some time already since my Powerbook G4 won't boot, but now I am determined to find the cause! When I press the power button nothing happens. I can hear the CD drive spinning, but then it stops and nothing on the screen. I can turn the caps lock and num lock keys. The num lock is turned on by pressing F5 instead of F6, though. I've tried hooking the Powerbook up to another monitor through the mini-display port, but I got nothing on the screen. I read a little bit about this and some advised to smack the laptop on a certain corner, that didn't work for me. Any advice on what I can do?