below is the reset sequence for Lawman ... should be the same or really close for scuba.
if the score motor turns once and the motor 2B switch releases the S relay and nothing else happens, most likely the SB relay didn't trip.
if SB didn't trip, check the ZB relay ... that should trip when you turn on the game.
lawman - gtb - 1971 - manual0004 (resized).png