Look, I know what I heard. And that was every old school screen I’ve ever encountered. What I don’t know is harmonic or flyback transformers.

Maybe maybe it’s a ntsc vs pal thing? I’ll restate, I don’t know anything about the tech but I could tell if a screen was on.

And before you restate that they were low quality: maybe every screen I’ve ever encountered was shit, yea. But then shit was the default apparently.