I have cabinet with an older 25 inch Wells Gardner monitor in it that has developed an issue a while ago with some strange discoloration. Monitor is probably at least 20+ years old.

I noticed the bottom corner of the monitor had an area about an area with the colors a bit off, a bit dark and the reds had a purple tint to them (similar to how a CRT acts when close to a magnet). This was most apparent on KoF '95 where the POW meter is in red, the 2p side was visibly purple instead of dark red. Cab is in a room in my basement with nothing around it that should cause interference and hasn't been moved around for years.

I noticed when rearranging cabs the spot would move, depending on what position the cab was facing or where it was at in the room it would vary in intensity or placement on the screen.

Ideas? Could this be something fixable with a degaussing wand or coil?