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29"Colour TV ,Sound Normal ,No Picture a vertical line Appears

I m having 29" videocon Colour TV .My TV set having following Problem -Sound Normal , But no Picture i.e a White vertical line Appears across the TV with Black Background

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  • talk2libin Apr 27, 2009

    i too have the same problem..
    unable to see the pictures only sound is there...
    whenever i switch on & off the tv contiously for 2-3 times then the pictures
    comes for that specific channel & when i change the channel,again cant see the pictures.. plz help me out. My TV is Videocon Bazooka.

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  • 56 Answers

Fault in HZ Deflection Stage check yoke also

Posted on Aug 16, 2009

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  • krishna
    krishna Dec 14, 2013

    hz stage ic no please

  • krishna
    krishna Dec 14, 2013

    any condencer problem

  • krishna
    krishna Dec 14, 2013

    give me some parts to check

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What is the cause of my 14inch videocon crt tv appears only a single vertical line in the middle


The image on a CRT TV is produced by a beam of electrons which is controlled by a magnetic field to move the beam top to bottom and left to right. A single line suggests that the vertical deflection is working but not the horizontal deflection (left to right). There are a number of components associated with this and requires a competent TV repair engineer to fix. Better to to buy a new TV!

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If it shows picture at first, and after some time displays a vertical line at the center of the screen, check the connector that goes to deflection yoke for loose connection at its bard end socket, and check all the solder terminals of capacitors at horizontal output section. If you wish to get some details, http://electronicshelponline.blogspot.com/ Pull up older posts.

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There is a horizontal line in the mid


Hello

The vertical scan of your TV has failed. All picture tube type TVs have both horizontal and vertical scan sections to scan the picture on the secreen. When horizontal scan fails, you will see a vertical line at the middle of the screen, and if vertical scan fails, there will be a horizontal line through the middle of the screen. In your TV, the second stated has happened.
This may be due to an IC trouble or a voltage loss inside the printed circuit board of your TV. To rectify this fault you have to open your TV, and locate the vertical output section inside it. It is very easy to locate that section. There will be four wires goes from the deflection yoke; the coil fitted at the neck of the picture tube; out ot which, two will be thick and the other two will be thin. The thick wires are usually colour coded as red and blue. Colour coding may differ from set to set. Anyway you have to follow the tow thin wires, as they are carrying vertical scan signal to the yoke.
Following it, you will reach to a plug in point on the printed circuit board. Upside down the printed circuit board, and follow the track through which that wire connection goes, and finally you will reach to the vertical output section.
There may be transistors or IC used on that section. First check the voltage at the vertical output section. Voltage lose also may occur in this section. If it uses IC, check for any loose or bad solderings at the terminals of the IC. I advice you to resoder the suspected points by applying a little more solder, without shorting the terminals. In most cases this will solve the problem. If there is voltage, and there is no loose solderings and still the fault perists, replace the IC or transistors, whatever it may be, with same type and number.
If you want anymore asistance, fee free to contact me through Fixya. OK.

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1 Answer

Red and blue ghosting,


The most likely cause is shorted convergence chips and possibly a few pico fuses.

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony,Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer2_bing.gif Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
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Problem #2
Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
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You can see some more examples and find a fix herebb0cf99.png http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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this we call vertical problem need to resolder vertical ic or to check on vertical side is there 24vdc supply is coming to ic

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If your screen has a picture in the left corner with a small square with lines on it but still has sound...try this....

unplug your TV itself from the power source, then hold down the power button on the tv itself for 1 minute, then release.... Plug the tv back in and see if the issue is resolved. I just called LG customer support and a woman walked me through this process and it fixed the issue !!!! Hope this helps..

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Hi,
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Thanks for using fixya.

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