When I played this pinball machine for the first time, everything was working as intended, and enjoyed it. The only gripe I had about this particular machine was that the moving buck wasn't registering shots. (Which basically made me alternate strategies and wait for it to move out of the way.) Ironically, it still moved as intended.

Any idea which part needs to be fixed? Tried looking at the manual from Stern's website but couldn't find what I was looking for.