Since I got fios installed on occasion I don't have sound when I turn on the TV or change a channel but as soon as I turn on TV and back on the sound returns the only problem is it is effecting my DVR recording which are recording without sound sometimes. I know it is not my TV because it was fine before I got verizon fios and when I shut the cable off and turn back on the sound comes back. Any suggestions on what might be going on or how I can fix?