I just bought a new LCD for the living room and have a quick question I hope somebody has an answer to please. When scanning for my local HD stations with my basic cable I can pick up 2 versions of each local, say channel 13 which is SD and 13-1 which is the HD version. But my local PBS channel the HD version is all pixel lated with little or no sound, almost like it is scrambled. My back bedroom TV picks it up just fine. Any ideas please?