I was just surfing the web when all of a sudden my monitor instantly starts to display only shades of blue! I can still read everything fine on my monitor and all but everything is just a tint of blue. The whole screen is just turned a tint of blue instantly, its a light blue color but it looks terrible and I wonder whats wrong with my monitor. This monitor is a ViewSonic PS790. It was made in 1999. Its really not that old I guess. Anybody have an idea whats wrong with it? thanks