I have a Dish 6000 and Toshiba TW65X81. When watching TV in SD mode I have noticed recently that the picture seems to be shifted to the right on most channels. There is a black line about 1 inch wide down the extreme left side of the screen where no picture is shown. Any suggestions? This does not happen when I watch using cable only when using the Dish 6000 and I believe only when in SD mode.