Bally Flip Flop. Insert coin, credit is added. Press start button activates Credit relay (switch contacts move). That's it. Game does not reset, GAME OVER remains on backglass. I can manually activate COIN relay, CREDIT relay, and RESET relay which will clear score wheels but game remains in Game Over. Will not kick out ball to shooter lane and nothing on playfield functions. If I manually energize Interlock relay LATCH coil, the game can be played. But the INTERLOCK relay does not hold at any point during startup. Neither the LATCH coil, nor the TRIP coil. They do not energize, they do not hold in order for the game to play.