Quoted from ovendust:I started a game...locked a ball and went into test mode
Switches registering:
24 - Right eject hole (lock)
11 - Middle ball trough
10 - Top ball trough
I just tried this on my Shuttle. Mine does kick a ball as expected, but if i put it back in the trough I get these results:
24 - Right eject hole (lock)
12- Lower ball trough (ramp in the manual)
11 - Middle ball trough
12 is the switch closest to the shooter lane. If I push the two remaining balls back up the ramp so they close 11 and 10, then lock a ball, I see the exact same issue you are seeing. No coil fires in an attempt to kick another ball into the shooter lane, and the game just sits there.
My guess is an issue with switch 12, or maybe the tip of the ball eject cam is blocking the other two balls from coming down the ramp and closing 12. FWIW, I had the same cam issue on a T2 where it wouldn't eject extra balls at the beginning of multiball, but otherwise worked fine. The slot in the cam had worn so the tip protruded into the trough just enough for the balls to get hung up.