Hopefully it isn't the RGB gun. Course the monitor works okay... if it's not the cable nor the color profile, guess you could reseat the card, but I doubt that would help. More than likely the vid card is going bad??? Maybe some outside interference?? Is it that red is GONE... if so are any colors that are a combo of red and some other color washed out? Could be the dig to ana on the vid card. Well, I'd bet the vid card is no good. Hope I'm wrong, sucks spending money.