Nordic Track 5100R circuit breaker problem
I have been running on a Nordic Track 5100R for about 16 years, both I and my wife use it 3-4x week each. This morning it switched off just before the end of a run. I checked the black/white circuit breaker switch next to inlet of the power cord. After this morning's failure, every time i put power to the treadmill, it trips the breaker. I replaced a board in it in 2016 (Treadmill Doctor customer service helped me troubleshoot the problem and had the right replacement part - great service!) and haven't had any problems since. Any suggestions on how to troubleshoot or what might be wrong?