Hello, My iBook G4 is 3 years old. I have 2 problems: My latest problem is that it won't charge the battery. I bought a new Ac Adaptor, and I used my battery and my adaptor in another G4 and it charges, but not in my computer. So I know the problem is INSIDE my computer. My father replaced the.DC-inboard when the pin off of my old charger broke off inside the computer. 2.) Now the computer won't turn on. If it does turn on it shuts off 20 seconds later. There is no warranty, I don't know where to start with fixing it since I can't get it to stay on. Please Help!!