ElkGrovePinball If the solenoid isn't firing in test you'd need to figure that out before working on the switches. If it's not something obvious like a loose wire I'd suspect the transistor on the driver board, or possibly a cold solder or connector issue. Do you know how to test the transistors with a multimeter?

I'm at pinburgh or I'd do something more detailed but try the "how to test a transistor" thread on this site. Basically set your dmm yo ohms and compare values between your 3 transistor legs to those on the working transistors on the board. There may be an unused but good transistor you can steal from the board.

Man, you really should have included that little nugget of info in your original post. I'd pass this one off to a tech unless you're good with board work and a soldering iron.