Does anyone have experience in getting their dc-in card changed out? I have a 15" Al PowerBook G4 that isn't getting power any more. I'm on my 3rd or 4th power adapter already (the mag safe on my unibody is such a better design), and just bought another new one to rule that out. its out of warranty, so i was wondering if anyone had any thoughts on any of the repair shops out there. Thanks.