Hi, I also agree with mcnumpty23, one of the component on the inverter board is at
the end of his life. What you can check is the connections of the inverter board.
Maybe it's a loose connection, it is worth trying before replacing.
Man I really appreciate the help, gave you best answer because of the addt'l tip to double check that connection, has fixed my screen fully, we will see how longit holds up, but thx to both of you very much