Samsung TV’s can be a bit finicky when it comes to power. Here is what to do when your Samsung TV won't turn on, or isn't working:
(timestamps)
00:00 - start
00:45 - power standby light
02:05 - power-cycle your TV
04:22 - power-cycle your remote
05:07 - reseat the power cord in the back of your TV
05:47 - try plugging your TV into a different power outlet
07:08 - make sure your TV is on the correct input source
08:14 - hardware issues (T-Con board, main board, power-supply board)
If none of these fixes work you might want to pull up your warranty and see if it is still valid, otherwise you’re stuck buying a new TV.
Full blog post: https://goodhomeautomation.com/samsung-tv-wont-turn-on/