My girlfriend iBook won't startup. The specifications of the problem are: When powerbutton is pressed, it seems to start up, but makes a full system shutdown noise after about 1 second. This happens when the power adapter is not connected. When the power adapter is connected, I don't even need to press the powerbutton for it to make a spinning fan noise. And it won't startup either. We already tried resetting the ram and power unit, but nothing helps. Does anyone know how to help us out?