Today at the start of the regular multiball, my RBION started rapidly resetting.
Any of the 3 rollover switches in the lock lane will now cause a reset, regardless of game state.
I also noted that with the balls removed, the game consistently resets when it reaches "12" on the "locating balls" counter.
Someone suggested it could be low +5 volts at the dot matrix control board but I haven't been able to test that yet.
Thanks!