LCD Pannel missing RED in every second pixel

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  • Sojke
    Senior Member
    • Apr 2017
    • 131
    • Serbia

    #1

    LCD Pannel missing RED in every second pixel

    Hi guys. I have an LED panel LG LP140WD2 TL D2 which suffers from missing an RED part of the pixel for every second pixel over the entire screen. Example:

    [RGB][ GB][RGB][ GB][RGB][ GB]
    [RGB][ GB][RGB][ GB][RGB][ GB]
    [RGB][ GB][RGB][ GB][RGB][ GB]

    I doubt its the drivers , 3 of them, because than that would mean that all 3 failed at the same spot, which sounds less likely, I believe it is the controller (LG SW0646) or perhaps some passive components leading to or from the controller.

    Any one had any luck of fixing such an issue?
    Also , are there any actual LCD electronics repair resources anywhere??
  • freakaftr8
    Badcaps Legend
    • Oct 2012
    • 3743
    • USA

    #2
    Re: LCD Pannel missing RED in every second pixel

    Reseat lvds cable? Also I would try cleaning the pin connections on the cable first
    Did I leave the soldering iron on?

    Comment

    • gabiz_ro
      Senior Member
      • Mar 2011
      • 167
      • Romania

      #3
      Re: LCD Pannel missing RED in every second pixel

      Don't think cable result in such effect.
      RGB are wide spread in LVDS signal format,and since only R are missing no imperfect contact have such behaviour to occur only on right timming to affect only Red.
      Panel datasheet
      http://www.datasheetspdf.com/pdf/908...P140WD2-TLD2/1

      You may test with other display (no matter size,only compatible pinout,most are standard 40 pin connector) )and see if defect persist then is from laptop if defect gone then problem is in display.

      Comment

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