I attempted to search and resolve this but I'm sorry I still can't get it.
I had an issue where the bonus stopped adding score at the end of a ball.... The inserts would light and click down any bonus earned, but no score would show up on the score reels. So.... I found the mechanism for the bonus under the playfield and after starting at it for a bit, determined that one of the "spokes" (don't know what this piece is called) was a little off, and when two of the arms would make contact with the contact points l, this one was slightly off. I tweaked it and now the bonus adds up fine after each ball.
So now.... If I earn double bonus, it clicks down without adding score, but without double bonus activated, the regular bonus adds up just fine.
I can't figure out what my next step is. I apologize in advance for the annoying newbie terminology I have used, not trying to insult anyone.
I feel like I had a little glimpse of EM understanding, but now I'm once again lost