I have an old Samsung UE55C8000XPXZT that after a storm started to shutdown itself after a few minutes of use. While I’m using it for the few minutes it stays on, it behave normally, after that the display flashes a couple times and it turns off (but the TV is still on even tho black screen and no audio). To revive it I have to unplug the power and leave it rest for a while.
Here is a video of the board: https://streamable.com/lvaxhh
Maybe someone can help me identify the issue. I’m quite affectionate to this TV and I’m all in for saving money and the environment without going for a new one.
I can’t tell from the video but I think you might have a dead capacitor somewhere. I’d suspect on the psu-board. Look for one(s) that bulge at the top. Just look online on how to replace them if this is the case. Fairly easy and cheap.
