Newburgh, IN
The ball search is a sequential activation of the coils.
have you looked at every coil to ensure that nothing is shorted as stated above? When you take out the balls and lift the play field, the wires and such are not in the same position as when the game is in the payable position. So look at how the underside of the play field looks and imagine it when the play field is down.
As a sanity check, try putting electrical tape on the lugs of coils that could be considered potential problems.
The other thing to try is to take all coils out of the circuit and force a ball search. Then add back a coil one at a time until it fails.
