Glad to help. This has always been one of my favorite machines.
See the attached picture. At the top are the 1s in the 4 colors. Each scores 5 points and to do so the score motor needs to run to count 5 points. Similarly at the bottom there are 4s in the 4 colors-red and yellow in the middle and white/green on the sides. These also are worth 5 points so the score motor needs to run.
The slings have the “10 points when lit” pointing to them. At the start of the game they are worth 1 point and change to 10 points when you get the red and yellow 1s at the top. Since they are only worth 1 point the score motor does not need to run.
On the upper left side of the playfield you’ll see the red 2 rollover. Next to it there are two posts with a rubber spanning them. Between the posts there is a 1 point switch. Similarly next to the white 2 rollover there are 3 posts, a rubber and a 1 point switch. The same is the case on the right side.
If any of the 6 1 point switches are closed you’ll continue to get points rung up and will run the 0-9 but the score motor will not run. Alternatively if any of the 8 5 point switches are closed it will be the same except the score motor will run. Given that you can at least narrow it down some.938EDD5A-DB53-4D42-A590-148EE97215C6 (resized).jpeg