I own a Proform J6 (297690) treadmill that I cannot get the walking belt to function. I replaced the motor, power circuit board and motor control board (mcb) and calibrated the console without walking belt or incline movement. I also tested the motor on a drill battery and the walking belt ran smooth with no incline. However when I connected the motor to the mcb there is still no movement of the walking belt. I do not know where to go from here, some assistance would be greatly appreciated.