I have a 95 Chrysler Concorde with the infinity sound system and amp, I have owned the car for about a year and it's finally bugging me enough about the radio display not working. Everything else works on the radio, radio lights up, turns on and operates in every mode, am, fm, cd, and cassette, the antenna even extends and retracts. I am at a loss as to why the display will not work, can anyone help please.

thanks