Question about Zenith SY2779DT TV

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TV HAS AN OCCASIONAL GREEN LINE THROUGH THE MIDDLE OF THE SCREEN

THIS TV DEVELOPS A GREEN LINE THAT RUNS THROUGH THE MIDDLE OF THE SCREEN

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  • Anonymous Sep 25, 2008

    theres a green line going threw the middle of the screen

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  • 3,130 Answers

The verticle output IC has a bad connection on it or is going bad. There are no user replaceable parts inside this set, as its a solid state set and all parts are soldered in. If your aware of the HI voltage issues, and know how to do alighnments on a tv, then you can order the entire board as a module from http://www.ptscorp.com. If you dont then your gonna have to seek a pro to assist you in this repair, as these sets hold HI voltage inside thenm even after they have been unplugged. Good Luck

Posted on Jun 26, 2006

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Posted on Jan 02, 2017

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1 Answer

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Hi..pls..help..my jvc television, im watching then turn off have a power but sadly it has a line at the middle of monitor and turn off.


You have a vertical amplifier failure or dry solder on the vertical IC. When cold if the TV works for some time and then you are getting a thin white line in the middle of the screen after some time -- its a dry solder problem. The vertical IC runs very hot in the TV and develops dry solder after a few years.Will run when cold and switch off when hot.
Are you well versed with electronics to do the repair yourself ?. If so, revert back and I will guide you if you mention the TV model #.

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1 Answer

Green line in middle of tv when switched on


Is there a picture with the green line going through the centre. If it`s just a green line with no picture, it sounds like the Frame (Vertical scan) Output IC has failed and possibly the safety feed resistor near the LOPTX. The reason why it`s a green line is to protect the tube from phosphor damage. The older TV`s would produce a VERY bright white line across the screen which could burn the phosphors withing the tube if left turned on in that condition. It`s not an expensive repair, but is it worth it with the price of Modern TV`s nowadays. If there is a picture with a green line, it may be due to phosphor damage, in which case, it`s a new CRT (tube). Ian

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1 Answer

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It is a bad unit. If it's new, get it replaced, there is no repair for this problem. Hope this helps.

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1 Answer

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Sounds to me like its your green tube. Kind of expensive replacement, but easy.

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1 Answer

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im pretty sure you cant fix that you probably need to buy a new one.. i know that because my somputer has a white line that runs right down that middle, not all the time but sometimes. my father looked into fixing it and he found out that you have to buy a brand new screen or tower or something like that.

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this symptom, sometimes called the tube light effect, it is characterised by a bright thin horizontal line across the middle of the screen. this symptom is caused by a breakdown in the vertical deflection circuit. hence maybe the trouble maybe in the vertical oscillator, amplifier or output circuits. but if all i have said is not clear to you, better bring it to a qualified tv technician. good luck!

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