Not sure about these sterio sets in Jayco campers but many of these electronics have a reboot cycle designed into the power circuit. You hold down the power circuit for something like 20 seconds and it blinks and begins a re-set.
I didn't see that in any lit. on the set I have but it's not in my TV and it has it designed in and so do all the ones I have at home.
Just a thought.
No man has a good enough memory to be a successful liar. Abraham Lincoln
2016 36FBTS Pinnacle
2016 F350, 6.7, 4x4, DRW, long bed
B & W Companion 5th wheel Hitch