The TDP-T45 projector worked fine until my most recent presentation (only used three times). Now, only portions of the slide show are projected by the projector on the wall screen. The actual image on the computer screen is not projected full size on the wall screen. Moving the mouse vertically & horizontally moves the projected image on the wall screen from one extreme to the other while the image on the computer does not move. The distance from the projector to the wall screen does not make any difference.