Yup sounds like the HOT shorted. You have several other
hurdles if it is.
What caused it.
Did it damage the power supply.
Big sets are a pain to work on unless on a bench with
space & lots of light. Also Sams doesnt list it ( got a chassis ##?).
The only things I remember with newer Pannys was HOT's,
the usual PC cons at hoz drive transformer & pin diodes.
If you go further post a few chassis photos to familiarize
us & maybe we can help.
It may be time to put it down sorry to say. You can get these
at Good Will etc for next to nothing. Just try to get an
older one from a big maker. I would stay away from Zeniths,
& NAPs. Sets before the late 90s wont be rebadged Chinese
garbage, more likely the real thing........
73 Zeno