Quoted from mot:You probably don't need to replace the switch. You probably just need to give it a little bend. When testing, make sure that you test with a ball and make sure the playfield is at the proper angle.
I just realized that it stopped working yesterday after I adjusted one of the table legs. The machine was slightly lower on the right, so I made the back right leg a little taller. Oddly enough, in addition to the switch not activating, the ball is jumping off the monorail ramp right into the right outlane. Maybe I'll put it back to where it was. Still seems strange though that the ball is jumping off the monorail when the right side is higher than it was.