One method I find may be supported is an Auto mode for the monitor itself, if you wish to stick with your resolution of source. On my Mitsubishi and Samsung, if the image goes off the sides, etc, I press the button one time to activate a self adjustment... It may help, but again, my problem wasn't EXACTLY the same. If the source is limiting the resolution, check the stats online to see if it is a problem or just the limit inherent. My two monitors are LCD, and they both allows nice flexibility for image adjustments
BILL