No special hardware set-up other than a breadboard, LED, and monetary button. Have the ControlBlock directly connected to the Pi. Have a button (monetary button for a breadboard) and LED (standard 5v red LED) connected to a breadboard for initial setup and troubleshooting. I have not hooked up the arcade buttons to the unit yet. Would that somehow effect it?

Next I'm going to try it without the button and just ground out the wires to see if the button is somehow effecting it. If you have any other suggestions please let me know. I won't be able to try it for a couple more weeks but will report back here how it went.