There’s some interesting trivia in this article.
It was discovered that on certain models if you typed the command
POKE 59458,62it would throw the CRT display out of sync, and after a short time could actually damage some of the circuits and burn out the display.
The Commodore PET has also been featured in countless movies and TV shows. Just to show a few of my favorite, you can see one in Star Trek II, the wrath of Khan. It’s apparently part of Captain Kirk’s antique collection.