I just moved into my sister's place. I hooked up my TV to an existing coaxial cable that had been there for years going unused. I connected the cable to the Verizon Set Top box which in turn connected another cable to my TV. The picture is great but I am getting what I call, severe static through the TV speakers and the soundbar. Am I getting this sound problem because of an old coaxial or is there something I have not connected properly? Could the set box be the problem?