I have a really cool story that I like to tell whenever something like this comes up. When I was a kid we had a very old 386 PC with a gigantic black & white CR

I have a really cool story that I like to tell whenever something like this comes up. When I was a kid we had a very old 386 PC with a gigantic black & white CRT monitor, it was also very heavy (at least for a little kid). The computer was in a room adjacent to the living room where we had the TV and one day we started noticing lines of snowy noise appearing on the image on the TV. It seemed to be random and it was annoying as heck. One day I'm sitting on the computer doing something in good old MS DOS and the door is open, so I can work on the PC and watch cartoons at the same time, so double win for me!! It is then that I notice something really curious, the lines of noise on the TV are identical in shape and pattern to the ones on my monitor!!! Whoa!! I try writing long lines alternating with short ones and they also appear on the TV, and even though you couldn't discern specific letters you could definitely tell the spacing between the words. Mind blown!!! I think the culprit was in the unshielded cable running from the antenna in our roof to the TV, which happened to pass by the room with the computer in it. Anyway, I solved the noise "mystery" that day, but was subsequently banned from using the computer whenever the family was gathered watching TV. Talk about being ungrateful :)