I have a G3 PB that is hard to start. I have replaced the PRAM battery twice. I also have the L-ION battery, which is fully charged, and I also have the power adapter plugged in and working. The only way I can start the PB is to remove Power adapter and the L-ION battery for five minutes. Then I will hold in the reset button in the rear of the BP for 45 sec. Then I would replace the battery and power adapter and hold down the on button for 3 seconds before I hear the PB chime ring. I have sent the BP to a repair shop before, they told me the power controller card needs to be replaced. My question is what do I need to replace? The Sound / AC input board or Power / Charger board?