Chosen Solution
Was watching screen - heard a zap and screen shut off. I’ll get a red light when I turn it on which is solid red for about 3-4 minutes then a flash. Power flashes 13 times in which if I read the manual correctly this is a Emergency SOS and need the A board replaced? Update (07/26/2019) Power board picture. Thanks for the directions.
@myopicvoid sounds like a bad power board. Remove the back cover from your TV and take a look at the power board. Post some pictures of it with your question. That way we can see what you see. Before replacing it, do a visual check for any obviously failed components and measure the board outputs on the connectors to the main board. Adding images to an existing question
