I purchased a used Vizio GV42L LCD television. Everything works well, except when I run Autoscan for channels, the Analog scans and finds nothing, and Digital will not even start to search. I tried using both the cable setting and the antenna setting. I am using only the buttons on the side, since I don't have the original remote. The antenna I am using is a Terk HDTVa Indoor Amplified High-Definition Antenna for Off-Air HDTV Reception. Any ideas?