Quoted from LTG:

Go over what you tweaked and look for any switches or wiring you shorted.
And go into Tests - Switch Edge - and see if anything is closed that should be open.
LTG : )

Quoted from LTG:

Go over what you tweaked and look for any switches or wiring you shorted.
And go into Tests - Switch Edge - and see if anything is closed that should be open.
LTG : )

Quoted from Coyote:

That kicker will fire when the Autofire opto is blocked.
Likely in your cleaning, you pulled or snapped a wire leading to the opto, which makes the game thing there's a ball in there, and it's trying to clear it out by firing the kicker. (The 'buzzing' sound is *likely* the shooter diverter opening.)
GO into switch test, and look at switch #72. Without a ball in there, it should be "Closed", not "Open (A)".
Check wires attached to both the opto (on one side of the autofire bracket) and the sender (on the other side of the autofire bracket.)