Hello. My PowerBook G4 17" isn't starting up. The lights come on for the 'number lock' and 'caps lock' keys but that is it. At first it sounded like it was trying to start up because I could hear things spinning, but then it would just die. Now it doesn't even try to start up. I get no whirring sounds, nothing at all, in fact.

I tried to zap the pram, start up from the repair disk-which is now in the disk drive and won't eject.

I also recently had my keyboard replaced. But it was working fine afterward. It wasn't until I returned to Japan, (I'm native Californian teaching in Japan), that it stopped working. I have had problems with this computer after it goes through the security check machines. Could that be the problem?