I'm a newbee to this forum but was told that you all are the best at this stuff. Here is the deal I have a Sharp NoteVision 3 (XG-NV3XB) LCD Projector when on the picture shows great but there is a green oval on the screen. I googled this and was told that it is the polarizer. If this is the case can it be fixed at home if I get the part from Sharp? Or could this be another issue all together? Please help...