I have familiar problem with my HFT. Then i play microphone test, no bars move, but both buttons works properly. As i start recording test and push in the microphone wire connection together, one red bar appears. I've thought it is a microphone scheme problem, but i changed it from a operating car and have same problem. Could i assume that it is a problem in HFT module and i should reheat the CB? But the thing that buttons are working properly let me to idea that maybe everything is ok with module. Maybe where is some extra fuse for microphone separately?