Question about LG DU-42PX12XC 42 in. Plasma HDTV

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Logic board failure

I was told my logic board went out on my plasma the repair place wants $600 to replace. I found boards on ebay for around $100-$200 is this a smart way to go?

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  • Zdenko Trivun May 11, 2010

    My LG DU-42PX212PX got an intermittent problem with blurry picture (goes on/off) and also two red vertical lines on both sides.

    According to gathered info from this forum looks like that the best way is to replace control board 687QZH034C.

    Is this going to rectify problems and where I can find the card. I checked eBay but is not available.



    Regards,



    Zdenko

    trivun500@roges.com



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You can do the repair yourself, you need about 3 hours to take apart and re-install. Keep a note of every screw, there are alot of them.

The board may be stuck on by some di-electric grease so pry it off carefully making certain all screws are off, check behind wires etc...

Replace with 6781QCH038C not the 060Q it will not work with LG's but will work for Vizio's

Posted on Dec 25, 2008

  • Jim Chang
    Jim Chang Dec 31, 2008

    Update:

    Spoke with PartStore.com, rep stated 6871QCH038C (038C) is the superceded replacement for the defective prone OEM 6871QCH038A (038A). They and others offer the 6781QCH060Q (060Q) for $50 - $100 more. I opted for the 038C, but I was concerned about the title of the part which states "HAND INSERT"... PartStore.com rep stated it is in fact a board and there is no soldering needed, just "plug and play". DONE, paid only $120.95 + next day shipping for $29.95.

    Since I took the TV apart before, it was a breeze and took about 2 hours, start to finish.

    Important note, remember to remove the two 1" square spunge type heat sinks/pads the new board needs those for a proper installation and protection of the certain component.

    Also you need two small zip ties to replace the ones you are going to clip off.

    Added Bonus, the new board fixed other issues:

    1. At times I would get a squeegly red line go across the screen. I thought it was the source (cable) but it is gone now.

    2. Screen Shift, when I use the XBox for Games or DVD/HDVD the screen would shift. Very annoying, prior to swap out, recently the screen started to shift watching cable. Now it is no-longer an issue.

    I am really pleased with my DIY repair and wanted to share.

    The damn Vizio Out of Warranty Service wanted $360 for a service call which included the part for $125 plus they take my bad board for exchange.

    6871QCH038C $120.95http://www.partstore.com/Part/LG+Electro... h/6871QCH038C/New.aspx
    Over Night Shipping #29.95
    DIY FREE

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The main board is the central hub of a television circuit system. The easiest way to identify a main board is to find the board with the various video and audio inputs/outputs. Generally speaking, main boards also contain a tuner, HDMI, USB, and S-video port. Main boards are one of the largest boards in a television. Main boards might also be referred to as a motherboard, main module, or an A/V board.

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