The CCFL ages and the color begins to skew towards red. http://www.google.com/search?hl=en&q=ccfl+aging&btnG=Google+Search finds articles about this and to fix it you replace the tubes.
I have a 17" SVGA C& series monitor, purchased in April, 2004 "like new". At this point in time, the screen isn't as white/bright as it used to be. It is becoming somewhat gray, and I don't know if there is an adjustment I can make to correct it. What do you suggest?