I have a PowerBook G4 1.67GHz Hi-res Dual-layer, the last model with digital audio out. The DC-in part has died, but the USB and audio-out is ok. The machine runs fine on battery but takes no charge whatsoever from the charger. The LED doesn't shine at all on the charger plug. I also have a shortage of batteries so I thought I could use the machine as an audio player utilising the digital audio output, so my question is: Can one connect the PowerBook charger directly to the battery connections ? thus bypassing the DC-in port/problem and eliminating the need for a battery. Which connections ?