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Vertical colored lines appear randomly

My tv screen shows vertical lines sometimes and even turning off and on again doesn't fix it. It does not depend on the video source, as it also exist on the tv menus. So it has to be a hardware failure, but I want to learn what can cause this and how to debug it. The lines move (when the image moves) and their colors correspond to the actual colors of the image that should which should be visible.

The effect can be seen here, but that is not my tv. It just shows the same symptoms: https://www.youtube.com/watch?v=YMbDogJr...

TV Model: Philips 55PFL6007K/12

Answered! View the answer I have this problem too

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Hi Donald, could you please tell me how you fixed your issue because I have the same problem with my 50 inches Philips TV and it’s very random it comes and goes away on its own.

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@Sarah M. I have replaced my T-Con Board, but it didn't help. After that I've sold this broken TV. So I actually don't know how to fix it properly.

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@onycro it is possible that it is the T-con board but the lines are bigger than I see on failed t-con board. It could also be a main board error or panel failure. I’d be prepared to replace the main board as well.

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BTW, Philips love to use chassis number instead of model numbers. Your TV is a QFU2.1E LA chassis

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Thanks, I will replace my T-Con Board now.

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I have replaced my T-Con Board, but it didn't help.

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Sorry to hear that but I figured it wasn't that due to the line size etc. Most commonly would have been a failed main board or a bad panel.

Thanks for coming back to let us know! Not to many people do that....

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It’s probably the T-con board in your TV. If you open up the TV there should be a model number on the metal housing of the display panel, probably with the LG logo on it. If you can find that and take a picture of it, that would be super helpful.

I’m fairly certain that this is the right T-con for your TV, but I want to be absolutely sure before you order it.

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Yes this is the correct T-Con Board for my TV.

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I have replaced my T-Con Board, but it didn't help.

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as far as i know theres ribbons inside the screen responsible for certain screen areas when one lifts from where its connected it causes a line onscreen you might want to bring back to the store you got it from if its in warranty or insured i wouldnt suggest you try yourself

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Donald D will be eternally grateful.
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