Sure beats why I found out the bale conveyer did'n work one mid August afternoon a couple years back.

Checked connections, good.
Checked lights in barn, out
Checked in house (same service); Out.
Checked shop (on same trasnformer); Out
Checked other house (different transformer, same supply phase); Out
Turned on battery operated radio, found power outage was not my fault, and larger than anybody could realize.