Hello. My name is Michael. I can help you with your question.
The first thing I would suggest doing is opening the machine and checking the voltage going to the motor - I believe you will find that neither of the motors have any voltage going to them. You can test the motors with direct voltage, but since they are both inoperable, that's not even necessary. Follow the leads back to the board that feeds the motor - this is the motor controller board - it is the board that should be sending voltage to the main motor and the incline motor. This is what needs to be replaced - it's the most common failure in this machine. Here is a link to the part:
Please let me know if you still have questions.