I don't know if this was mentioned already, but look for an aprox 1"x1" square
shaped black colored part. It's a 3 leg thermister labeled on the board as
THP601. It's on the far left of the main board toward the back a couple inches
from the fuse. Look at all 3 connections to this part under the board. You'll
find a burnt connection on one lead. Resolder it and you'll be all fixed up.
Ron