I have a Hanns .G HF199H Monitor and need a driver for Windows XP home edition. When I try to load certain games all I get is a black screen

SOURCE: HANNS-G MONITOR BLACK SCREEN JUST FLICKERS

I have the same problem. I leave the computer on for awhile to warm up the screen. I don't know why, that seems to help. I turn off the screen on the bottom right and do that a couple of times. Behind the screen I unplug and plug and unplug and plug the screen in again. After it gets going, it works all day. But at night I like to turn off the computer to rest. So I have to do this every morning.

SOURCE: Monitor dims on a black background hanns G 28

Go into monitor settings and turn "off" X-Contrast. X-Contrast will auto change contrast when backgrounds darkens. However, adjust manually the Brightness and Contrast settings to compensate.