I got my 720 up and running but I need some help from someone with some monitor expertise. The colors are pretty good, doesn't look like any burn in. I could adjust the colors more because they are a little off. The problem is with the horizontal stretch. If I turn the knob one way the picture goes completely small, if I turn it back the other way it won't stretch the full length of the screen. How can I get this picture to cover the full spectrum of the monitor? The horizontal stretch will not stretch the picture any further then you see in the pictures below. Any help would be appreciated. Thanks