Came across this video not sure why ahah but well, I fixed several TV's (LED from various brands) just replacing the failing led, usually I look for signs of burning on all LED's just in case they look like they will fail soon. If more than 2 look burned on the same stripe is better just to replace the whole stripe because the others might be "overwhelmed" with the extra voltage. Each stripe takes ~24vdc, if you check on the controller board it will be written there. ( also on power board all power pins will be marked as 24v) Most of my test clients were friends and family on "nothing to lose repair style", and the repaired LED's always lasted for more than 2 years before they fail again, actually my own 75inc Samsung has almost 12 years, kids use it from morning to eve and already repaired 2 times after warranty around 4 years difference between each repair. The best trick if leds do not blink at all, is to switch on the TV, pick up a flashlight on a dark room and point very close to screen to check if display is actually showing up image, if this is true then you know leds are faulty. Have a good one and for more future cheap 1/20th of a new tv repairs!!!

Good job. You were thinking out loud. I appreciate your work. Sorry that the screen broke in the end. Keep at it.

Great work, bad luck breaking the screen.

Keep up the great work

I have exact same issue as of today. So... swapping out the LED strips would fix this? I did see a another youtube video who had same issue where he could see the screen when using a flashlight.... but his TV did stay on longer than just a quick "flash". He replaced the LED strips and TV was fixed.