When turned on an E2 error is displayed after 7 seconds. I tested the motor with an 18 volt battery and it turns as expected. I noticed that there are some burns on the controller board where the blue and white wires from the power supply board. They are listed as the AC1 and AC2 prongs on the controller board. Do you believe there is an issue with the power supply board or the controller board. The incline motor works as expected.