Hi, I'm Pete. Welcome to JustAnswer! I'm reviewing your question now, and will post back with your reply ASAP.
John, can you tell me a little more about what is not working?
Is there any any sign of life from the treadmill at all? e.g. does the display come on?
Will you or someone else be assisting you with any repairs?
Do you have any test equipment available?
Or are you looking for a repairer in your area to come and service the treadmill?
John, I haven't heard back from you yet - please reply and let me know if you still need assistance with this.