I'll probe it when I get my stuff set back up... it's all SMD, so I'm crossing my fingers that it's an amp or something simple, and not one of the chips with 14+ pins. I've tracked down all the chips, all replaceable (with some vigilance, of course).
If I could figure out the signal routing, I'd have a place to start, but I can't figure out why it's blown in the card AND the box, unless the output of the card is jacked, then I'm probably "not so lucky, Pierre". I'm guessing something closer to the latter, since I get no sound from those channels that the AD converter went bye-bye.
Hey... I actually have a couple O-scopes! I don't know what I was thinking... I can actually see what I can't hear now. Guess I'll start probing around and see what I come up with.