You just need to adjust the "color lines"... go to the button that says "test" (if you don't have that button - just get to the screen where you see crosshairs. You will need to adjust each color up or down/left or right... until the only thing you see is a white crosshair! you should see no color in the crosshair, at all, in order for it to be set properly. Try it... you'll see.