This is a 4 player game. Player #1 over scores on the 10,000 score reel.
I had this exact same problem recently on player #3. On that one, I noticed the 1000 reel was sticking as the #9 came around. I adjusted the reel and it has worked fine since.
No such luck on player #1. I have done the same thing, and more. But, it still runs up the score as the 1000 wheel comes up to zero, the 10,000 reel over scores. So now I am trying to figure out if it could be an electrical problem, as opposed to a mechanical problem like the #3 player used to be?
I don't see what that could be just looking at the schematic.