This one was given to me. What did confuse me was the RF channel going out with just a cable with nothing at the other end. As a long shot, I'm thinking about putting a q-tip in and see if something is stuck in there that is shorting that circuit out. Crazy mystery to me.... Thanks!
Finally unboxed this after two years only to find that when I connect a cable to the sub out jack the right front channel goes dead. This happens even if it's just a cable with nothing attached to it. Checked cable to sub (as well as open end cable) and no sign of a short or resistance. Didn't...