Just my luck... another burnt part, in a different unit.  Unlike my other one there were no unusual symptoms beforehand.  Same settings as the last unit.

http://i.imgur.com/weLyGs3.jpg?4


Now I'm wondering if unplugging the affected miner from the bus would work.  Might be tough to do, but it would let me use the other seven miners on that module without having to try and repair the broken one.