Hey all, My Royal guard machine is making a very loud hum. I isolated the problem to the unit (step unit?) in the back head. Pulled the cover off and solenoid was very very hot. Would this be a open relay somewhere? I'm new to working on pinball machines and reading the schematics. I own 5 Wedgeheads and have done some minor repair/ fixes and love tinkering on old equipment.
Thanks,
Jeff