It has dust on the lenses. My RCA rear projection uses a 7/64" allen key. take the speakers' cover off and then remove (I think) the three screws below the button pannel, and 2 on each side on the back on button pannel. the projectors should be easy to see. I turned mine on when I cleaned the lenses so i could tell if there was any streaks.
Once the lenses are cleaned go to auto convergence in the setup menu and your problems should be fixed. Good Luck.