Recently I have been restoring a 1980 Xenon, adding new boards and a new playfield. Everything has been working all well(meaning the game works and everything is restored) except the left flipper. A connection is getting to the button on the outside of the machine but the flipper just won’t flip. I thought it would be an easy fix and just assumed it was the solenoid since it’s been in need of a new one, so I switched a new one in but it still doesn’t work. I’m guessing it has to do with something in the head of the machine but I can’t find anything. Any suggestions?