wrote in message
ups.com...
You have done a good job of localizing the likely problem. I would try
resoldering every component on that board. If the traces are exposed,
you might even try "painting" them with solder, but watch out for
solder bridges. All three of my Sony TVs (purchased from the TV-500U
in the late 1960s to the KV27XBR55 in the 1990s) have had cold solder
joints. They finally became reliable sets only after I fixed the bad
solder joints.

You might have to do this yourself. If I were in the repair business,
I would be very reluctant to take on an intermittent problem like this,
evne though your detective work has improved the chances of success.


If I were in the repair business I'd be all over a problem like this, he's
tracked it down to within a very small area, sounds like it'd be a fairly
straightforward repair with little chance of blowing up a bunch of expensive
parts trying to track down the problem.