Toshiba 60" Rear Projection Model 62HMX95 Problem

I have a problem with my screen shifting to the right. I have a one inch border on the left side of my screen and the station logos are cut off on the right side. I have tried to unplug the the tv and reset it. This has worked once but eventually I am having the same problem. I get this problem when I have it on Theater Screen 1 and when I have it set on regular screen, the one inch border is a black line on the left part of my screen and it cuts the picture. Is there anything I can do to correct this?