You didn't tell us the brand or model of the radio.
If it isn't the reset button explained in the radio owners manual, take it to any stereo installation place and get it fixed for as low as 20 bucks and entirely replaced with an android 10 inch screen for $150 to $1,500.
Make sure you've read your manuals and make sure your use/store switch is turned on. It controls the radio and cameras. No 12v in the coach, no radio.
34 things wrong?
When you ran through your checklist before picking it up from the dealer, were the wrong 31 things working/repaired?
We can likely help you with many of them since you're out of warranty now or soon will be, you just have to tell us how and what.
What would you have bought after trade in?
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