A degauss causes a magnetic field inside the tube to oscillate rapidly, with decreasing amplitude. This leaves the shadow mask with a small and somewhat randomized field, removing the discoloration. A degaussing in progress. - read more
How to Degauss a Computer Monitor. Degaussing a computer monitor clears electromagnetic buildup from the screen. Although it is hardly ever necessary, degaussing can sometimes slightly improve picture quality. Simply turn the monitor off... - read more
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