I searched for this issue and couldn't seem to find anyone having the same. I'm working on a pin for someone and I've got it all working except the chimes while in game.

The chimes all work fine, because when you press start to begin a game, it gives the start up tune.

In game, no chimes for any scoring, no matter what switch is hit. Game does score properly.

Things that may be important to know:
-Some owner at some point eliminated almost all connectors and soldered every wire from edge connector to edge connector. They actually did a decent job and I've checked continuity from the wires to the nearest components and it seems solid. Not ideal, but does the job.
-I've added the ground mods from pcbs to the ground plane, as suggested in Clay's guide.
-I've added the pullup resistor to the Kings reset coil transistor under the playfield.
-I see a tiny amount of corrosion from the old battery, but really hardly anything. I'll attach a pic.

This is my first system 1 repair. Thanks for any suggestions.

-RC

20220817_173923 (resized).jpg

Oh, man, I'll be thrilled if it's that simple. Fingers crossed. Thanks, much.

Ended up being switch 20 but that did it. Rocked off and on a few times and it's working. Thanks man. Had no system 1 experience. Woot.