Radio audio

What is your question?

I just installed new radio in my car about 14 months ago. It played ok for about 12 months,and the audio for the radio stations stopped playing. The CD has audio the clock works, and every other function works fine. Its just the radio audio quits working. I took it back out of the dash and unplugged it and reinstalled twice it and it will play for about 3 or 4 days and quit again. The radio audio is the only thing that stops working. If someone could come up with solution for this I would really appreciate your help.