Advertisements I have been experiencing video macro-blocking on a number of channels, mainly HD, from Verizon in Howard County, MD. I have used the Tivo signal strength screens and found that on the channels with blocking the strength is about 50 or so. On channels without problems the signal strength is 80-100. I have called Verizon and they keep claiming that it is a Tivo problem or an HDMI cable problem or something else ridiculous. They keep telling me to contact Tivo to resolve the problem. I'm have seen problems like this before - mainly on one HD channel - but the signal strength seemed to improve after a week or so the signal improved and the problem went away. Does anyone know what causes these signal strength problems with FIOS, and how to get the problem resolved?