Needs a complete mirror and lens cleaning AND all the coolant needs
replaced in the picture tubes after they are disassembled to clean the
growth of years of crud that is on the face of the tubes. Strongly
recommend you have someone do the job who has access to all the
training, parts, and experience to do the job properly. Typically
under a $250 total repair depending on how badly the adjustments have
been screwed up.

David