Anybody have any idea why there would be a slight yellowish discoloration in the bottom right hand corner of both of the RPTV sets that I have gotten. Don't know if this is a common problem since it has been on both that I got. Thinking of exchanging this one too,unless there is an adjustment I could make. Can't be degaussed due to three separate tubes and I did a auto convergence on it.Any other ideas? Thanks for any help anyone could offer.