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by morgankay on September 28th, 2008

morgankay

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I have an RCA D56W20 56" TV that the picture has a purple/red tint to the whole screen. This happened all of a sudden.

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  • by barsoom_redux on September 28th, 2008

    barsoom_redux

    This is a rear-projection HD-TV using CRT technology, which means there is a conventional CRT projector inside with a large mirror to reflect the picture. CRTs show color by using a combination of three electron "guns", one for red, one for blue and one for green. If your screen has gone purple-ish then for some reason the green gun is failing.

    It could be the display circuitry feeding the green signal to your CRT, but most likely it is the CRT profector itself that is now unable to use the green gun.

    If the picture is occasionally good, maybe when you first turn on the TV (try unplugging it from the wall socket for a couple of hours first), then it is more likely to be the input circuitry.

    If the picture is bad all the time regardless of what you do then it is probably the projector.

    Either way it means a trip from a TV repairman. Hopefully it's still under warranty.

    Hope this helps.

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