Hi @plowboy,
Welcome to the Sony Online Community! The description you are giving is very unfortunate since that sounds to me as a clear sign that some electronic components are aging slowly in the circuit boards of your TV. It might sound very strange to you, but have you verified to see if the problem persists if you keep the temperature at where the TV is located at a constant 23-24 degrees Celsius? If you notice that it does indeed prevent the issue, then that is a definite sign that the electronics circuitry will very soon be giving up completely.
I do not think servicing the TV would make sense financially either, so perhaps slowly you must be better preparing yourself for a new TV. I'm afraid there's not much you could try to do about it.
Cheers,
Dutchice
