The machine won't start it locks and try's to start. It makes a loud humming noise and then kicks off I think it might be the start capacitor.
The start capacitor would not be causing the issue. You will want to check the motor and make sure that the actuator is good and that there is nothing causing the motor to bind. It could also be that the gearcase is faulty. The best option is to get the tech sheet from the control panel and run the unit through a diagnostic to see what error codes are stored. The tech sheet will have a list of the codes to determine where the problem lies.