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I have an old Phillips Magnavox television. I turned it off and, as usual, the screen took a while to completely stop glowing (vaguely white glow). As it was almost black, suddenly there was a flare of light in a circle-like shape that grew and then faded away. This bright light was like looking at thick vertical bars of primary colors through a cut out circle and was as bright as colors would ne if the tv was on. Does anyone know what this is? Is this a fire hazard?

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Techman(solution #2) is correct on your problem. #1There had better be no air in a crt.that statement should be discarded by all means. If you drop down your contrast level the phosferous in the crt will not glow as warm thus reducing after-glow. Hope this answers your question.

Posted on May 29, 2008

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And to top that off, that means your CRT in your TV is better than average. It means that the CRT has less air in it than most causing the slow discharging of high voltage. RCA and most companies call this "afterglow" and in some cases the CRT will also do a "preglow" when you first power it up.

Posted on May 29, 2008

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No that is a normal situation, as it is the high voltage bleeding out of the picture tube. You will normally only see this happen in a darkened room. I would not worry about it.

Posted on May 29, 2008

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