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Hi ther I have a LG plasma TV model # RU-42PZ61 this one have two vertical lines one blue and one red. what's the problem on this Item please help?

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  • THEY ARE LIKE ONE INCH THICK UP AND DOW

    I CAN'T SEE TRUE THE LINES

  • http://imageshack.us/photo/my-images/577... http://imageshack.us/photo/my-images/62/... http://imageshack.us/photo/my-images/535...

  • yes sr I will replace the board my self I just need the name of the part or a link where can I buy it.

    you are a good profecional man thankyou very much......

  • Thank You!

  • hi remenber mi heare are some more info the screen blinks and turn ligth blue or green but you syil can see pictures some times blinks like a bad video card like pictures on negatives

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Are these lines thick and opaque or are you able to see the picture through them? If you can just get me a picture of the screen that would be great. You can upload it to imageshack.us and get me the link

Posted on May 20, 2011

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  • eagle338
    eagle338 May 20, 2011

    That sounds very much like a buffer boards issue. But I cannot be 100% sure until I get the image . So please take your time and upload the image when you can. I will confirm if that's the problem and get you the links to order replacement parts.

  • eagle338
    eagle338 May 21, 2011

    Yes it is definitely due to the buffer boards . So would you like to replace the boards yourself?

  • eagle338
    eagle338 May 21, 2011

    Ok Here's the plan. We cannot know which board is faulty with out testing the buffer AKA driver boards with special equipment(oscilloscope) . So we are gonna have to replace all 4 of them . They cost about 125-150$ together. All you gotta do is to get me the part numbers of the three slender boards that look like this
    http://assets.shopjimmy.com/media/catalo...
    The Y-drive looks a little different like the below image.If you zoom the image below you will find the part number printed on a white sticker in the top left corner. Starting with 6871.xxxxxxx.And the Y-drv board that looks like this
    http://assets.shopjimmy.com/media/catalo...

    Get me the part numbers of all 4 parts and I will get you the links to the replacements

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Hi,
This symptoms indicated of malfunction on the logic board, sustain boards, and/or power supply board. This is responsible for processing the image in your unit. Your unit is prone to bad connections in the said board. You must take it apart and check the cable connectors from loose connections. Pull-out all the cables from the main board, logic board, sustain boards, power supply board and then re-insert securely.
If the symptom still persist, first to check is the output of the power supply board feeding these boards. Once missing voltage from the power supply it will disable the other board and produced same symptoms. If you confirmed that the power supply is not the issue, then the fault now is quite technical and you need a copy of the service manual if you are going to DIY. This will guide you to the test point on that board.
If you don't have necessary tools and test instrument and can't troubleshoot the symptoms yourself, I would advice you to look for a qualified LG tv technician to isolate the symptoms.
Also check if your unit is still under warranty/extended warranty period, avail it because the manufacturer will fix it for free. Don't open the back cover because it will void the warranty.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

Posted on May 21, 2011

  • Jdvillanueva
    Jdvillanueva May 21, 2011

    I think you have a new comment but I can't see it...

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Posted on Jan 02, 2017

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