I just picked up these ibooks as parts from a local seller. All have issues. Three G4 Ibooks and two G3 Ibooks. No video at all on the 1.33ghz Ibook, it bongs on start up. Damaged screen(1/2 of it works) on the 1ghz G4, boots and runs fine. The third G4 is a 1.2ghz model, it bongs on start...