What kinda monitor is that. I didnt think that was possible anymore.
It used to happen a lot more when CRT monitors were the primary type used which is why we have screensavers. It don't think many modern monitors are still prone to this but I could be wrong.
Used to be normal for CRT, which is why screensavers were created. I know it can still happen with some newer monitors and TV's, particularily plasma, but I figure that's pretty rare these days.