Haven't had a single instability, it starts up and works fine for weeks
No restart, shutdown, temperature or whatever issues. Just this weird problem in windowed mode - fullscreen works but is not as smooth as windowed mode, no black flashings.
Here is another one:
https://photos.app.goo.gl/3p2ayxhqCz8nmURa6
I'm afraid the others are already gone or I had to disassemble them for different reasons
The one above has a small infrared remote to turn on/off the screen. There is a very old Atom based PC in the bottom and the small opening on the right is for the power button. I've connected everything to my node red based smart home system so I can shutdown the PCs from Alexa and my Smartphone and start them again via Wake on LAN. My kids love these virtual fish tanks.