Hi, I have a 'problem' which is thatI can't get FM button to work on my Kenwood/Trio R-5000. I mean that when I'm listening to the receiver I get audio fine in any other mode ie USB AM CW etc, but when I press the FM mode button, the LED lights on the button fine, but the audio simply goes dead, even with an FM broadcast which is heard with distortion using the AM button. So why does the audio go dead? I just bought it of EBay a few days ago, and I'm puzzled about this ! Do I need to install an FM demodulator or what.

Thanks in advance, Radio Ham, callsign GI4HDJ Bernard