On Mar 30, 7:31*am, "Bob Donahue" wrote:
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.

Usually the horizontal sweep circuit has a 'pin amp' transistor
((basically, the Hsweep drive is a high voltage, but instead of
returning to GND, current returns to a low voltage pincushion
amplifier). The pincushion symptom often means the
transistor has shorted (or otherwise lost gain).