Question about Samsung TXH1970 TV

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Duaghter ran a magnet over the TV

There is a green section. i dont want to run over it again. (see ) does it really work?

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The TV requires a manual degaussing. Degaussing is the operation that neutralizes a magnetic field on the face of the tube that causes the color distortion. There is a coil inside the set that does this each time you turn the set on, but it's not strong enough to counter the field the magnet left behind. An external degaussing coil would clear this up, unless the magnet used was so strong it caused phyical damage to the picture tube (but that's unlikely). You could purchase a coil from any of several internet vendors, or call a TV shop in your area to see what they would charge.

(There are some techniques described using a small motor appliance like a hair dryer as a degaussing coil, but generally they don't work reliably. If you are really curious, a quick search using Google or another search site will get you links you can check out.)

Posted on Jan 23, 2009

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Magnet came in contact blue green and red color

Every time you turn on a color TV, a degaussing circuit tries to neutralize magnetic fields on the picture tube face that can cause distorted colors. That degaussing circuit isn't strong enough to clear up the field left by direct contact with a magnet. You need an external degaussing ring to clear up the funny colors. You can see what one looks like here. You might be able to find one for sale on eBay or borrow one from someone in the TV service business. Or you can take the TV to a shop where they can degauss it for you for a small charge. Just be aware there's a chance the picture tube may have been damaged if the magnet was very strong and was in contact with the tube for any length of time. A thin metal screen called the shadow mask is behind the tube face, and if that was warped by the magnet then the colors will never line up correctly again. If this has happened, even after degaussing the colors will still be wrong. But you won't know until you try. Good luck, and thanks for using Fixya!

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1 Answer

My picture has a green circular section and a purple one what is wrong please?

That happens with magnets and could be caused by the magnets on the speakers, some green or purple stay forever, but some disappear when you unplug and unplug the tv repeatedly or with other magnets.

Mar 15, 2011 | Bush 2871NTX 28" TV

1 Answer

Green at bottom left corner I have a Zenith B27A74R 27 can i still get parrts to fix this tv I really love this tv

Green pach at the corner may have due to many reasons. The first one is due to the degaussing posistor resistor. If it have got open this fault may occur, the second one is open degaussing coil, fitted around to your TVs picture tube. The posistor faulure is usual. The other reasons are due to magnetc induction from nearby. To ensure that whether it is due to posistor failure or not, you just switch on the tv, switch if off. Turn its position to an other, say just 90 degree. Turn it on agin and see there is color patches comes on more parts of its screen, the posistor said above is working well, if not it is out. Replacing it is the only remedy.

The fault may be due to the magnetic induction from ouside. Be sure not to get any external speaker boxes or any materials that can cuse magnetic effects, nearby your TV. Turn the TVs loation to an other position and notice the effect.
This is due to some magnetic field there to deflect its electron beam to improper locations inside your picture tube.
To replace the posistor you have to open the back cover of your tv. The posistor is small resistor, cased in a black envelop, and look like a black small box, and can be located in the main power supply input section in your TVs power supply regulator sections. It usuall have 2 soldering connections, some may have three. Replacing it with similar type and number will solve your problem.
Before that be sure that there is no external magnetic field disturbs your TV. Ok.

Oct 25, 2010 | Zenith B27A74R 27" TV

1 Answer

My sony 24in flatscreen has green color on right

dont power your tv near sound box or machines with magnet,

switch off tv, get a magnet and pass it all round your screen, it will clear with no time

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1 Answer

Top picture overscan issue, again ...

Overscanned in the top of the screen,is the symptom defected capacitor in the vertical section. Filter capacitor 100uf or microfarad or it is better you replaced all capacitor there and reworks or resolder all solder joint there in vertical section.So it will works better again..


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2 Answers

Pink tv screeen

if ur tv is CRT (picture tube) just power OFF it for 20-30 minutes and then power up again. problem will be solved.

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1 Answer


Any TV repair center should be able to run a degauss coil over the unit and see if it's caused by the tube being magnetized. If that doesn't fix the issue then they can install magnets on the outside of the tube to clear that green shading issue.

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