I bought a HUO LOTR years ago
-Super black dirty playfield like yours
-Balrog didn't swing out right
-Magnet fuse had blown, so ring magnet didn't work
-Ring ramp spinner switch broken, so modes could never start
I was a bit sad for them, as they never really got to truly enjoy what the game had to offer....but once I cleaned it up and fixed stuff, it's been quite the champ ever since!