I think you've got the wrong end of the discussion, there. If you can't or don't want to turn you CRT off... then what's the next best thing for avoiding burn-

I think you've got the wrong end of the discussion, there. If you can't or don't want to turn you CRT off... then what's the next best thing for avoiding burn-in? Send it a black signal, or send it a bright signal? It's the black signal, because it charges the screen less. Charging the screen is what causes burn in. If you charge it less you get less burn in. > Arguing that CRTs could display true black Nobody argued this. Where did you think you read this? I said 'show a black image'. Send it a black signal. It's the minimum signal you can send it without turning it off.