Back in 2016 we bought an LG Model 65UH615A-UC 65" 4K LED TV. It has performed well and been mostly reliable.
Except that every so often I have to unplug it from the house mains, wait some minutes, and then plug it back in before moving on. This usually becomes necessary when apps, like the one for YouTube, emit nonsensical warnings like "no network" or "no Internet", or simply refuse to come up. The TV's SOC (System On Chip) has limited RAM to work with (certainly less than half a gigabyte once WebOS and a few apps are loaded) and occasionally will reboot the TV when it runs low. For a long time I thought the problem was just bad software design on the client app side. But now I'm not so sure.
Had a moment of dispair this morning when I fired up the HP Elitedesk machine we're using as an HTPC and got a black screen and "No signal" error on the HDMI port it was connected to.
After a few reboots, multiple reseatings of cables, and probing over an ssh connection to the machine I determined it could see the TV, but for some reason the TV couldn't see it: so the problem was with the TV. Or that DisplayPort to HDMI adapter. Or the HDMI cable between the adapter and the TV. Or a zillion other things that can and do go wrong in many Anthropocene households every day.
But in my case, fortunately, it was something going on in the TV's SOC: because all was well after I unplugged it from the wall for around five minutes and then plugged it back in.
Yeah. I went there. I "tried turning it off and on again."