Hello all. Just got finished refurbishing my 1959 Queen of Diamonds. The game plays fine, but when a game is over the diamond lights (which are all new bulbs) for the match feature won't light up. Today I took apart the 0-9 unit and cleaned it (again), but I could not find any loose or broken wires to explain the failure of the match circuit. I also cleaned the two switches on the X relay (Game Over Relay). Finally, I cleaned the pins on the match feature unit and made sure they were on "In" not "Out", which they were. I can make the bulb sockets work and the lights are fine - tested a few. There is some problem with the entire Match Feature. I'm at a loss, but I do have schematics (see attached). Any help appreciated at this point.

Match1.pdf

Match2.pdf

Good suggestions, Mark. I will rig up a test wire with clips and see what I find. It's gotta be there somewhere!

OK - so I finally got to testing the circuit. It wasn't a problem in the back of the machine - it was the X relay. There was a wire loose that didn't look loose until I touched it. Problem solved! Thanks.