During Heartlands earlier days, there were problems with cables being misrouted, having bad connectors and other issues. It took me the better part of a day to resolve them and I think they have since improved the way they install the a/v cables. I used a length of coax and a continuity tester to find which coax went to what location. If I ran across a cable with no continuity, chances are it had a bad connection/connector somewhere. Initially, my antenna amp was mis-wired as well. Needless to say, I had a few less hairs on my head after that day.