Hi, Having an issue getting the J/L fully functional. I have installed a new Rottendog MPU327 to replace the CPU & Driver board combo. Almost everything is now working except for the following. Game powers on, load credit, press game start button and it fires ball 1 into the shooter lane. I fire the ball, score some points, it all works until the ball drains. Once it goes into the outhole it fires it into the ball rack correctly (not sure correct name) but ball 2 doesn't pop into the shooter lane nor does it register ball 2 on the ball display. But if I manually capture the ball as it is about to drain - avoiding the outhole switch and manually place it in the ball rack, it will fire the next ball into the shooter lane while the display remains as ball 1.

With my DMM, I've confirmed that the outhole wires have full continuity to the connection on the board. Also have checked for bad diodes on the outhole switch matrix column and row. On the solenoid test, all fire as they should. On the switch test, it shows no closed switches anywhere. Any ideas?

Two balls in the game. The book says two and there are two ball switches in the ball rack.

Update: I spoke with Jerod @ Rottendog today and found there is currently a known issue with this problem on MPU327-2 boards. They are testing an updated board as we speak.