Good evening and my first post =) I'll try to start out on the right foot and sound half-way intelligent. I acquired a gimped Powerbook G4 from one of our 'daughter' companies. The laptop works fine when using the A/C adapter. If I unplug the A/C adapter while the power is on, the screen/keyboard lights will go off. However, the hard drive is still spinning. If I plug the A/C adapter back in, the LCD backlight comes back on, but it does not display what was on the screen. I have to hold the power button down for a few seconds to power it down completely. Upon turning it back on, everything works fine again. Does this sound like a battery issue or motherboard problem? I have checked the battery serial number against the recall list and this one is supposably good. Thanks in advance!