I recently attempted a repair on a Williams Hyperball. My problem is the ball lift motor is not working, when the time for it to come on comes it just hums and vibrates. I have check power going to motor and have 120V . Then I took the motor out and hooked it up to a 120v table power supply I have and it runs great. I am wondering if the power is not switching or alternating just applying straight 120v not alternating. I am I crazy to think this or if I am thinking right what would cause this? The motor power switching board? Thanks so much for any and all help. it is greatly appreciated.