TS-10 Keyboard Calibration error

I’ve been having a problem with my TS 10 not calibrating, at first the F2 and F3 fuses were blown because I wasn’t getting a display recently so I replaced them and then I noticed the F3 fuse was getting brownish so it seems like it’s about to bust, but hasn’t quite yet.

Another thing is, I took out the keybed and the keys off of the circuitboard where the coils are located and there was a decent amount of dust and crud which I cleaned out, but I noticed the right circuit board ( which is the bottom circuit board in the picture below ) has some discoloration to the traces and the coil’s. I’m not sure if something is failing or what and if this is what’s causing the keyboard not to calibrate? Just trying to figure out what other test that I need to do to solve the problem?