well your monitor should have some sort of controls built into it.
on mine you just hit the main button then push the arrows down to the brightness option and press that main button again. Then using the arrows again adjust the screen to the disired setting. Then exit.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS