So there has been a change since cleaning the score motor ?
The reported initial problem was the Bonus unit coil was continually on.
Now the "500 point add bonus relay unit" is clicking ?
Peach - is it serving the ball out for "ball 1" yet ?
Are all the targets up ? Or are they still leaving the black ones up only ?
You can clean the contacts on the "500 point add bonus relay unit" and see if it makes a change.