Hi, My roamio wast starting to act pixelated so I've decided to reset and went through the guide setup but now I cannot get the cable signal showing at all. When I tried to look at the cable signal level, if I press channel up, it reboots. When I go to channel list, it only list about 80 channels without any HD where as before I got over 300 with HD. Is this the problem with the signal that's why I am not getting any HD? TIA.