I had the same problem with a Jensen 212T in my 2015 ACE. I verified the coach had power and tried the reset button without success. I had to replace the unit. In looking for a replacement I could only find a newer model Jensen radio or a refurbished unit like mine because I was concerned about getting all three cameras to work properly. I bought the refurbished unit because it was easier to install and was disappointed. The refurbished until has problems with tuning and isn't much better than the original. If I had it to do over, I would take it to a car stereo dealer and let them install a quality unit. They can install a switch to get all three cameras working properly.
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