Try running a small magnet in circles from the centre of the front of the screen, you may find you may be able to "push" the problem off the screen. As snakehead commented, it's likely to be caused by speakers with a lot of magnetic field bleed placed near the front of the TV. If you are feeling brave try this homebrew deguasser! http://woil.ws/fixmonitor/
You must have placed speakers around your tv. your tv tube has gotten magnetized.you will need a degaussing coil to remove those color stains if you do not have a coil call a tech to remove it for you.good luck.
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I picked it up at GoodWill for $15. It is hard to believe that is all that is wrong but I am willing to check it out. It is 27 ". Would this work? from uxcell. Thank you for responding.
Hand held TV CRT Picture Tube Degaussing Coil Repair Screen / Degausser
Model Number: a06052600ux0007
Market Price: $27.99 Our Price: $13.79 Add To Cart
Hand held TV CRT Picture Tube Degaussing Coil Repair Screen / Degausser New
Features:
* High quality guaranteed
* Degauss the color spots, shadow mask, and aperture color etc on the screen
* Degaussing coil was sealed with plastic peel for easy use
* Applied to colorful CRT, monitor, game displayer, PC displayer etc
* Easy to operate, point at displayer and move it with circle for 20 seconds when press the button
Specification:
* Effective magnet: 70MT
* Operating time: <3 minutes
* Dimension: 30*30*200(mm)
* Power: 220V AC
* Weight: 336g
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