I have a 15 year old RCA F27120WN that has just developed what I think is
called "pincushion" distortion. The entire picture is filled in, but
vertical lines near the sides are bowed inward. (Horizontal lines are fine.)
Any particular circuit or component I can check? Other than the pincushion
distortion, the set still has an excellent picture.

I'm experienced in electronics and radio design, but not so much with TVs.

--
Bob D.