Yesterday I realized I had lost channels between 120 and 200 on both my new TiVo HD. I also have the pixalization problem on both units as well. I live in Phoenix and have Cox as my cable provider. Anyone have any idea what happened with channels 120 to 200? When I check the signal strength I get a very good signal on the missing channels, but no picture. I have no problems with other channels besides the pixalization issue. Any help would be great.