I'd be inclined to think that The machine has taken a surge or possibly something bad has happened as a result of the charge cable being ripped out of the back even... have seen this kind of damage from the latter. For what it is worth, as the Pismo and Lombard are of a modular design, I would suggest sourcing replacement sub-boards rather than attempt a repair on an individual component level... I know PBMedic used to stock such items however in this day and age i am not sure what their stocks would be like. Ebay or another 68k member may be your friend here.