After some period of time I get a Thumping Noise (like a drum beat) when I try to change cnannels. It won't stop unitl I turn off the box. Also, I suddenly get more channel options consisting of a dash followed by a number after the main channel number (i.e. 13-3 etc.). This is new. Also, in the upper left of the TV screen I get an underscore dash after the channel number that I'm entering (i.e. 365_). This is also new. Finally on some of the dash number channels I get a note that the box is searching for an off air tuner or something to that effect. Has anyone had this problem and a soultion?
George
George