TweakHardware as an article on how you can tweak your monitor:
Full article:
http://www.tweakhardware.com/guide/tweakmonitor/
Looks simple enuf although I don't have enuf guts to pry open my 19" even though I'm quite sure it's my GF2MX which is causing all the blurriness at resolutions >1024x768
Older monitors may have difficulty delivering a bright image and showing a pure white color. Many monitors cannot deliver enough light to show a decent image even if you use the button on the front of the monitor to adjust the brightness (the ☼ button). This can make it very difficult to play some games, like Counter Strike, in which some of the maps are on dimly lit places.
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The short version on the modification:
The trick is to open the monitor and locate 2 specific potentiometers inside. Once located, you can adjust the focus and the brightness of the monitor with a simple screwdriver.
Full article:
http://www.tweakhardware.com/guide/tweakmonitor/
Looks simple enuf although I don't have enuf guts to pry open my 19" even though I'm quite sure it's my GF2MX which is causing all the blurriness at resolutions >1024x768