Picked up a Technics ST-8044 from the swap meet yesterday. Fairly clean cosmetically, inside is spotless. Looks like it has never been opened. Passed the dim bulb tester. Hooked it up to my JVC integrated, and got no sound. Just to verify, also hooked it up to my Technics receiver, in both the Aux and Tape In connections. Still no sound, but what is even more odd, it is tripping my speaker protection circuit. Didn't do this on the JVC, just the Technics. Already looked at the "service manual" on Hi Fi Engine, really only shows how to do alignment and not much else. So question is, where to possibly look for a cause of lack of sound, but also why would it trip my protection circuit?