Try installing (or re-installing) your video card drivers. Also, make sure you are not using "Standard VGA" for your monitor type.
For a WG D9200, you should use "Super VGA 800x600". because this monitor goes up to 800x600.
If this does not work, then, go into device manager, and see if there are any unknown devices. If you find one for your video card, DELETE IT, after installing the drivers.