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Acoustic Solution LCD tv Model LCD37805HD Sorry 37 inch Switched on and coulour rotates Red Green Blue white black Etc Sound is working.

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  • 4 more comments 
  • Chris Welsh Aug 28, 2010

    Yes I would like to replace board, I have 5 of these so spare parts should not be a problem.
    Kind Regards
    Chris Welsh
    Could boards from same make but smaller size work?
    Also If your have tech manual that would be great.
    of the 5 2 have blinking colours(above solution)
    1 has no picture but has power
    1 has red tinge but picture works albeit red tinged
    Are all fixable ?

  • Chris Welsh Aug 28, 2010

    Hi I have just added comment.

    Yes I would like to fix.

  • Chris Welsh Sep 02, 2010

    What is approx size of this board. I can see Power supply board. Then Large board a4 size I believe is the main board. There is also a board by buttons about a5 in size(pc free board replaced this no difference) there is also very small board seems to control s video in.

    Kind Regards

    Chris Welsh

  • Chris Welsh Sep 03, 2010

    HI I replaced tcon board with no difference. Then replaced main board and now tv works.

    Do you know where I can order these main boards from Part no MB22-2 336974 I am having difficulty in finding a supplier.

    Kind Regards

    Chris Welsh

  • Chris Welsh Sep 04, 2010

    Red sticker on board =31374

    Green Sticker on board =mb22-2 336974 s/10 ha rohs 25/10-24/8-11

    Purple sticker on board = 26278508 37" 20337444 LGX4 NT123-ING-29

  • Chris Welsh Sep 04, 2010

    Sorry printed on board itself is 17MB22-2 021106 Although I assume these are standard boards for all types of lcd tvs They just have different components added to them. Model no of tv is LCD37805HD.

    Hope this helps

    Kind Regards

    Chris Welsh



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You have a faulty t-con board. Have seen this problem a 100 times this week. Replacing it should resolve the issue. If you want to do it yourself then let me know and I will give you detailed instructions in replacing it. Board costs about 75-100$

Posted on Aug 27, 2010

  • 3 more comments 
  • eagle338
    eagle338 Aug 28, 2010

    No you Cabot use a part from a smaller set unless the part number is exactly the same. Yes it should fix all color related problems. I do not have a service manual for this set but it's pretty straight forward. There is a small board next to the main audio/ video board. It has a pair of ribbon cables that go into the panel. Sometimes the t-con board and the main board are covered with large metal plate. If that is the case then you should first unscrew tue metal plate from the chassis. Some safety instructions for you
    1) Unplug the set from the power supply before you start working on it.
    2) Never touch the capacitors. These things hold residential voltages that are potentially lethal.
    3) Always touch a metal object for a few seconds before starting the repair. This should help you get rid of the Electro Static discharge that can damage the circuits on the PCBs.

    If you need any further info please feel free to let me know.


  • eagle338
    eagle338 Sep 02, 2010

    There is a board that has a pair of ribbon connectors going into the panel. That is the t-con. Its located next to the mainboard(usually). However in some cases it is attached to the panel itself. If you still can't find it then get me the part numbers of all the boards you can see so that I can tell you which one of them is the t-con.

  • eagle338
    eagle338 Sep 03, 2010

    That does not look like the part number. Can you get me other numbers off the board ?

  • eagle338
    eagle338 Sep 04, 2010

    Anything before mb coz acoustic boards start with 17mb 22

  • eagle338
    eagle338 Sep 04, 2010



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