I have a TIVO Roamio and Mini with a Verizon CableCard. All of my channels work except for two HD channels - The Weather Channel and USA. I get a V52 (no signal) error when tuning to either of them. When I go to the TIVO diagnostics, it says there is no Signal Lock. The funny thing is the SD version of USA Network works fine, and the HD version was working again for a time. Any suggestions on how to fix?