I purchased a Tivo in February. On occasion the video is just freeze. At first I reset (cycled the power) it, but later found that the menu system worked and I could reset it that way. Sometimes just doing a channel up/down would cause it to work. This all tells me that the basic unit is working but that the video interface is getting hung up. I called customer service to ask for an exchange. I was given all types of reasons that it could hang - low signal, strong signal, etc. I finally asked for a supervisor. After 25 minutes (!!) the... read full review »