Korg EX-800 number buttons question

Hi I just got an EX-800 yesterday and immediately proceeded to drop an adapter right on top of it. Number buttons #1 & 2 no longer work. Not sure if it’s the carbon pad, the tactile switch, wiring, etc but it’s devastating. What should I look for? I do not have an EE degree bottle can I read a schematic but am very handy w soldering iron so hopefully I can figure it out. Any ideas?