@kiwa I used to have an industrial label printer that worked that way. If you moved the mouse too much, the prints would corrupt. If the screensaver activated, the prints would corrupt. Sometimes I'd have to print for 30 minutes straight, and spend the whole time carefully moving the mouse a little but not too much
@foone years ago I had a ridiculous PC Chips motherboard in a 486 machine where for some reason it would suddenly reboot if it was under high CPU load without a bit of mouse or keyboard input.
Oh, to have been "blessed" by having the US sales outlet for them in town before online shopping was a thing. It was originally called BEK for some reason. @kiwa