i couldn't get the proprietary screw off the single serve coffee maker, but i was able to get the plate out of the way by removing the other screw and spinning it around. i didn't notice an obvious short, but i did learn that there was quite a bit of water in there. so, i'm going to leave the plate off for a bit and let it dry. i do remember washing the coffee machine out before i packed it, and it might have gotten a little too wet, although it was already demonstrating signs of a short (you had to fidget with the cord to get it to turn on).

i don't know the answer to this question: if an electronic circuit is water damaged, is drying it out enough to fix it, or is it permanently destroyed?

if i can't find a clear answer as to the cause, i should replace it, as it might be a fire hazard.