Hi 3v0,
Yes, the console or overlay, is definitely bad. I bought an "Arduino" board to play with PWM signals, and I applied 500hz, 1000hz, and 31000hz to the PWM pin on the motor control board with the same results as before (motor starts for less than a second only when there is a "loose" connection). I also tried two cordless drill PWM units with the same results. I would think that the application of a valid PWM signal would just work! The LED on the motor control board flickers when I get the motor to start, which indicates a valid speed signal, but, of course, it doesn't stay running!
Thanks for your thoughts!
Mike M.