Sony XL-2100U Projector Lamp for KF-42WE610, KF-50WE610, KF-60WE610, KDF-60XBR950, KDF-70XBR95 "reset 60we610" Questions

KF42WE620 Red picture all of a sudden the picture has a red hue to it. The set is about 4 years old. Have tried all the adjustments in the manual, resetting to factory settings doesn't change anything