Don't make any assumptions based on what the original owners said.
It's secondhand information from people who don't understand the
technical details. And it wasn't repaired, so it was only a guess
anyway.

Make your own tests and measurements.

Adam Preble wrote:

The original owners had the television inspected, and they were told
"the board" is fried, due to the voltage regulator attached to it. They
were told this is somewhat common for that model. The parts should
still be readily available, and I'd be looking at $400 if I had a tech
do the parts and pay for labor. I was hoping to muck with it myself
though.