Just picked up a very clean example. cosmetically that is. It powers on but I get no audio output when tuning the dial, from either the fixed or variable RCA jacks. I have checked the obvious, starting with hooking up a known good tuner. So the cabling and amp are not suspect. The fuse on the back is not blown, which I assume would leave me with a totally dead unit. Any suggestions on where to start? I am handy with screwdrivers and Deoxit and have a multimeter. Oh and the meters... No movement at all when I turn the tuning knob. The signal strength meter is zeroed and the tuning meter is centered.