Ahhh... I'm just dense, sorry.

Nope, no voltage to any pin with jumpers removed. Good unit does show voltage.

So at least there's no short. But could there be a trace on the back that's fried?

At this point, the problem seems somewhat isolated and it's clearly nothing I can do about it. I'll be sending it to Eutronix later to get this puppy in tip-top shape and then I'll see how it goes...

Thanks everyone!