Charlie Bress wrote:

I have been chasing an intermittent failure (or a series of failures) in a
1998 Panasonic TV. It is Model CT-27G13W, Chassis #AEDP303.

Did you check how the deflection current gets to the deflection
coils?
I once met a TV where this was done via a very tiny connector plug,
that proved to give bad contact. Cleaning this plug and the pins
resulted in a perfect picture.
As I was told, the previous owner had dumped this device in fear
of too high repair cost.

Regards,
H.