HD channels not available
HD channels were fine today, then images became blurry off and on. Error message xre 03059 appeared and said channel temp unavailable. Non HD channels are fine. Tried sys refresh and problem persists, so called xfinity cust service who eventually said I need to exchange my cable box and recommended going to a local xfinity store. It sounds strange if a cable box is bad that it would only affect HD channels. Suggestions?