10 yr old TV, most likely will be cheaper and easier to replace it than buy parts to fix it or have someone fix it. Most likely thing is that you need a new power or system board. But those don't always fix things.
Thanks for the response. I thought that may be the case. Off to the TV store this week.
Another option is a used TV, can get them for half the price often. I have seen 50" 4k sets for hundreds under store prices. I don't remember last time I bought new electronics outside of maybe something I could not find used or got with 0% interest that I can pay off over several years.