I have a 6 year old RCA RPTV that is displaying a green tint in the dark areas of the screen. I have calibrated the set with the THX video mode on the T2:Judgment Day DVD and it has not helped. There was an earlier post about somebody who had a problem with a green tint on their set on light and dark ares but my problem only occurs in the dark areas. Any opinion would be greatly appreciated. Help!