hey i just purchased a 46 inch sony bravia after my first was stolen and upon turning it on i notice something. the screen has what looks like dark streaks running vertically down it causing a sort of striped appearence to the picture. this isnt on the screen, its actually in the picture. its most noticeable during panning shots and looks almost like an odd type of screen burn (althougth it isnt). does anyone know how to get rid of this or atleast know what it is caused by? ive tweaked around with picture settings but that doesnt get rid of it.thanks.