About a week ago I noticed my the ant tuner for my 706 mkIIg installed in my truck was making a clicking sound without any equipment powered up. I unplugged the 12VDC to the radio and the noise stopped. A day or two later, when I had some time, I tried to do some troubleshooting when I noticed the radio would no longer power on! With power applied to the radio I am reading 12VDC inside the radio at the circuit board AFTER the fuses. Also I did not see any burned traces, arc marks, damaged componants, or heat marks. I'm stumped... Has anyone else had this issue, seen it, heared about it? Where should I look next?