The effect is quite common on large screen CRT sets, it is due the
shadowmask heating up locally, ie just in the part where the white
information has been, it heats up due to the high beam current,and distorts
causing the wrong beam landing on the wrong phosphors, and showing up as a
purity error, incorrect opperation of the BCL, and the setting of the first
anode control, or simply too much contrast,can cause this effect known as
"doming" ,you could try adjusting the contrast setting to the lowest
possible without degrading the picture

"Allan" wrote in message
om...
Hi,

On my Mitsubishi cs-2710ra TV, if a scene contains an area of bright
white that persists for more than about 10-15 seconds, that area of
the screen will start turning green. After the white scene goes away,
the green gradually fades.

Why does this happen, and what is the remedy for this, if any?

-Allan