Just learn how to fix your games properly, rather than getting in somebody else to fix
Hardbody is a great game to learn on, one you can diagnose and fix that, you can fix any other Bally from that era (1977-1985(?))
start with the power supply , fix and clean all the connectors, then work your way through the rest of the game
if you dont want to work on the boards, then buy replacements, clean the connectors and be happy