"Main Account" writes:

This makes me think that you may have some unshielded or poorly shielded
speakers sufficiently close to the CTR to influence it. If you're using some
external speakers try placing them away from the monitor. If the internal
speakers are doing this... I had a 27" Samsung once that use to do that. I
took it apart got rid of throw those speakers and install new ones with a
better magnetic shield. They happened to be exactly like the speakers I
collected from one of those computer monitors with speakers inside....

If it's only light (bright) colors, I'd lean more towards doming - heating
of the shadowmask causing local changes in purity. Turn down the brightness.

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...sm


"Lewis" wrote in message
...
I have a Goodmans 19" (I think) CRT TV which is used mainly for gaming
(Xbox). If very light colours are displayed on it for much more that a
minute, the purity will start to degrade. Let's say a racing game is
being
played, the car takes up most of the screen, and is light silver. After
about a minute, the right of the car will be pink and the left will be
green. This would suggest that it's magnetised by some external source
but
a similar thing happens to the 21" downstairs, but less extensively. It
is
not all that noticeable on most games/programmes but I have just bought a
game that has almost entirely white menus and within a minute the menu is
half red half green. As soon as darker colours are displayed, the
distortion goes away. Also, if a very still image is displayed for a
while,
the same thing happens, even with darker colours. Switching off,
degaussing
and getting the image moving again all make it fade away, but only
temporally.
Any ideas?