My paragon has been working fine for months. While recently playing a game the ball landed in the Paragon saucer (upper right) and didn't kick out. Went into solenoid test and #4 solenoid doesn't kick. Tuned the game off and come back later it's fine for a game or so. Then it quits again. Thought maybe a heat issue. Next day turn game on and it still doesn't work. Later that night I turn the game on and it works. I don't play a game I just shut the game off and turned it back on again and it doesn't fire. The game didn't have a chance to get hot in the backbox. I determined transistor #14 is for the saucer so I grounded it and it fires. What would be next step?

It scores correctly and plays the appropriate tune every time the ball lands in the saucer. I don't think it's the switch.