Quoted from conester:
So the other day I was playing my Embryon and the left pop started just going crazy...even when the ball wasn't hitting the skirt. I ended up shutting the game off and turning it back on to get it to stop. I figured the switch was adjusted too close so I adjusted it and when I tested it, the pop won't even fire now when I hit the switch. I tested the solenoids in test mode and the pop fires then, so I'm trying to figure out what might cause this. Any ideas?
Many times the capacitor on the switch goes crazy.
Cut one leg, if random firing stops, replace the cap.