Larry. I see a CB antenna...does it work? Do any of the other functions on that panel work. ie: i-com, navi voice, WB (weather band)...any of those work. The whole shebang is the Audio Unit. Everything in the world goes though that Unit, even the speedometer pulses. Does the speedo work ok. I guess the point is there are a ton of things that could be wrong. From the switches on the left handle bar, to the power amp under the rear of the seat, to the unit itself. As far as I can tell, there is no single "chip" that would correct this. It is a Unit with tons of inputs and outputs and the manual does not show it broken down to that level. I have no earthly idea what the Audio unit would cost to replace but due to the complexity of it and what it does, it may be pretty high. In order to diagnose the problem correctly, you need to know exactly what works and dosen't work on that panel. In other words, the schematics show that you select AM/FM and internal to the Unit, the radio is activated and outputs to headsets or speakers. What goes on inside the unit is not described. But everything on that panel goes through the Audio Unit. Hope that wasn't too confusing. Isaac
