I had this problem
The radio was an aftermarket Sony. Occasionally this would happen. Then a couple weeks ago I hit a bump it went out hit another bump it came on hit another bump and that was it. I had it checked and they told me the radio was dead. Hence I replaced it with an inexpensive Pioneer.
God, Guns, and Jeeps - What else do you need?
The beauty of the Second Amendment is that it will not be needed until they try to take it. -Thomas Jefferson