I was thinking TCon board when I first saw it too. It's the TV in my Mother's bedroom, about 4 years old but she runs it 24/7 so I'm sure it has a ton of hours on it. I don't live in the area and this is the first time I've seen it since the pandemic.
Planning to return next month and replace it, I'll bring it back with me and swap the LEDs with strips from Alliexpress and post my results.
Funny thing is, she doesn't think there's anything wrong with it! Just like the old days when people would somehow not notice they lost one of the guns in their CRT.
