Quoted from NicoVolta:Oh... another tech update. I recently had my first opportunity to install new AS relay boards on a Spin-A-Card. It had horrible carbon tracking on both sides which was causing the wrong cards to light up during the spin sequence (short circuits).
If you have a 1970's Bally multiplayer EM, you should immediately open the backbox right now and look at the player unit stepper. Odds are, you’ll see some carbon tracking on the circuit board. Use the alcohol, Mother’s polish, alcohol, and dry Teflon lube technique to remove it... otherwise the sparks will eat through the bakelite and cause other problems.
Other problems like a FIRE! That one had alotta play left compared to this one out of a Flip-a-Card I did a couple years ago: