Hello, my name is***** to Justanswer! Give me just a few minutes to look up some specifics, I'm working on this now.
Do you still need help with this?*This is an inquiry to see if you still need help. I'm here to help when you're ready. Due to the nature of the problem, it may take a few tries back and forth before we finish the troubleshooting and fix the problem. First, try unplugging it from power, or remove the battery for 5 minutes. Return the power, and tell me if you see any improvement.
I don't think that unit has a battery, now that I look at it. There is an electromagnet that causes resistance. It's possible that the magnet has become misaligned, or the wire has come loose so that power cannot be applied to the magnet. Check for loose connections on all wires that you can get to.
Click here, this is a very useful article as to how the resistance works, and how to get to it on many bikes. Let me know if you have any questions. These are sometimes very simple repairs, and sometimes not so much. The bike isn't dead, but the magnet has a problem.