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The lower left 1/4 of my screen is discolored slightly. It shows red highlights in peoples faces. The area is shaped a a square or rectangle and seems to be exactly a quarter of the screen. The TV was refurbished recently.

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  • vidovision Jun 25, 2009

    Did I mention that this is a Sharp Aquos LC-52D92U (LCD)?
    The area is a perfect square with a defined line.
    I have heard of magnets working on CRT's and have also heard of degaussing on CRT's but not on LCD's.
    I was thinking this may be some sort of convergence issue but maybe I am wrong.



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  • 378 Answers

It need to demagnetize using a demagnetizer or permanent magnet (PM). move the PM to the center of the tv then rotate it ccw make a round small circle to bigger circle as you move the PM away from the screen. But do not put speaker near the tv. You can also switch off the tv for a night then turn on again this process will demanetize the screen automatically but be sure no speaker put near the tv. If this will not solve the problem. it might be the technician forgot to refix the degausing coil or Thermostat.

Posted on Jun 25, 2009

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Posted on Jan 02, 2017

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