Quoted from Schwaggs:The resistors you mention are all the 10k resistors near the top of the master display board, right? Several look toasty in your pictures.
Be careful with those display connectors. Those contacts have long been discontinued and are pricey to replace if you can even find them. They rarely fail anyway. If you have a bad contact, try lightly cleaning the contact fingers on the board with a fiberglass sanding pen.
Deoxite works great. Wipe a little on the board edge connectors.