Well...after playing the game for a bit I noticed that when the red and yellow are paired on 100 and the center target is hit, no points are added. I manually tried all combinations and 100 is the only one that does not work. The subway doors open, but no points are added. The score reels will count up from 90 to 100 and if the center target is hit at 200 or 300, it scores properly. So I am guessing the 100's relay is OK.

Because the score motor does not move when the yellow or red bumpers are hit, I have eliminated it as an issue. It points to the 0-9 stepper or where the current flows to when the 100 is paired. I have cleaned and checked the stepper pins for alignment. Help appreciated!

Thank you Richard,

It will be later in the day before I can dig into it.
Don

Cleaned the right and left steppers, looked for damaged wires, cleaned related relays. Still no go. Unless there is some ideas as to what to check, I am going to have to create a check list with the wires and locations to check for breaks and or voltage. Feels like a Aspirin headache and so I am going to put it off for now.

The game is otherwise usable and the probabilities of that score begin hit are low. I have owed the game for 49 years with the last 10 to 15 in storage. So I am going to have some fun with it and share it with my grandson.

Thanks,
Don