Samsung Smart TV Turning Off and On? Cheap Quick Fix 2013 UN60ES7500

Almost 2022 and this TV is still going strong. Friends have a new 70" 4K UHD TV in the next room and sitting 7' away from the screen on the sofa I cannot tell the difference.
Please read David Hogg's excellent comments attached somewhere below.
Though my solution still works great 2 years later at the end of 2019, David Hogg dove deeper and got closer to the root of the problem with less potential side effects like the remote not working.
I have not tried his fix since my TV works OK now, I am way too busy with other projects and don't have time to crack open the TV, try out David's more elegant solution and post a new video.
Thanks to everyone for the comments.
The most amazing thing to me is that no one from Samsung will 'fess up to this, explain it or apologize to their customers. I guess we're supposed to throw it away and buy new.
Corporations seem completely unable to get with 21st century and be honest and forthcoming in the face of RUclips and the user community throughout the world.
My 2013 vintage UN60ES7500 Samsung Smart TV began turning itself off and back on immediately about once every 90 minutes, then over a two month period increasing in frequency to every 20 minutes. Power Supply Board good. New Main Board did not solve problem.
Disconnecting Smart TV wire bundle from the main board solved the problem. TV works great now. Using an Apple TV to stream, which is much better and faster than the slow clumsy Samsung Smart TV interface.