To have one motherboard die is unlucky. To have another die in the same week is downright infuriating.
Dirty power? Faulty power cable? Phase of the moon?
Miffed.
Update: Good news! I just brought one of the motherboards back from the dead. I stripped it down completely and very thoroughly checked it over. Somehow the BIOS had become ever so slightly dislodged.
Happier.