@1mouse
I found this from a mac website ( I am also a mac user):
First things that come to mind are just the basics:
Reset pram: hold down cmd-option-P-R keys just after starting up. Keep holding these down. You will hear the startup chime again. Keep holding until you hear the chime three times.
This has worked for me in similar situations, but I don't know why because it shouldn't work: hold down cmd-option-a-v at startup. It's an old key command for use with AV monitors, but desperation makes odd fixes look more appealing...
Reset the PMU: see this page for directions for your exact model of iBook:
http://support.apple.com/kb/HT1431?viewlocale=en_USTry starting up with the CD that came with the computer: Put the cd in and hold down the C key when you start/restart.
Look through Apple's support pages if you haven't already. You might find some answers there.