I'm a relative noob when it comes to fixing tuners and could use some troubleshooting direction. The tuner in question is a Mitsubishi M-F01. When I have it hooked up to a preamp and tune in a station (based on the signal strength meter and lit up "lock" light), there's no sound from either the Fixed or Variable outputs I have to choose from. But if I switch to the FM Multipath outputs, I get music. Of course, it may be just a matter of me studying the schematic and looking for leaky capacitors and bad solder joints.