There’s one LED advertisement board in my area that I see pretty often. Nowdays I’d say it shows something it’s not supposed to more often than an advertisement.

Previously I’ve seen BSOD on it a couple of times, but recently a lot. Also “Finish setting up this device” and part of the desktop showing Windows 11 wallpaper.
My guess is someone upgraded it from Windows 10 to 11, and now it works even less.