I have an Audiovox D1708 Portable DVD Player that was given to me. It has sound and the LCD screen lights up, but it is a light tan color as opposed to the normal blue. There is no text or visual output to the screen. As an electronics hobbyist, I was careful to disassemble the unit and activate the laser assembly. The laser moves up and down and then travels about 1/2 inch. It seems to move freely by manual actuation. I have cleaned it without any change. I would appreciate any input as to what might be the problem(s) and any opinion as to whether it is worth keeping. Thanks to all who respond.