I believe you're thinking about Davison County whose county seat is Mitchell. They had an equipment breakdown (computer) & couriered in the repair parts (I think it was an EPROM).
If my memory isn't betraying me, this was initially reported as a power failure.
Now for the good part. Final voting tally for Davison shows an almost equal split between Thune & Johnson. This surprised me as I thought Davison was solidly Republican.
BTW, I don't have to see a skunk to know it's there. But I do need to see it to kill it!
Yep---the nose knows!! ;-)