AOC 2236 LCD monitor, bad caps?

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  • darkcon
    New Member
    • Apr 2012
    • 5
    • New Zealand

    #1

    AOC 2236 LCD monitor, bad caps?

    Hiya, I was wondering if anyone else has experienced a problem like mine

    awhile ago a line down the center of my screen appeared, my first thought was dead pixel line the panels going bad...except the pixels arent dead,they are just misshaded

    later on I noticed green lines appearing around/on anything on the left half of the screen, slight miscoloring of text etc, from what I can see the left half of my monitor has a slight green tint with green squiggles, and the right half has a slight pink tint with no squiggles

    its hard to describe, so I'll take photos of the images/videos that cause the worse green lines and post them after I finished writing this

    Its sort of like the green color is slightly out of phase with the rest, like when EMP went off near you in BF4(for those that play) only its just the green going out.

    Things I've tried so far:

    replacing all the 10uf caps(other caps still going to try, but none appear dead even the 10uf caps) - no effect

    pressing lightly on the ribbon cable connections, - no effect

    reseating all the ribbon cables - no effect

    reflowing the controller board - no effect

    plugging the controller board 5v line into a high quality stable 5v line of a pc PSU, worked like normal, still the same green crapola tho - no effect
    ^ this makes me think its not the power board in my LCD.

    the only other thing I can think of doing is changing the 25v 100uf caps on the controller board

    and recapping the entire power board, even tho I don't think its the power board based on the PC PSU experiment.

    anyone have any ideas? Could it be the panel itself?

    Cheers, Ron


    Edit:
    Picture of the green squiggles





    Pic of the original image

    Last edited by darkcon; 01-14-2014, 01:24 AM. Reason: Pics
  • darkcon
    New Member
    • Apr 2012
    • 5
    • New Zealand

    #2
    Re: AOC 2236 LCD monitor, bad caps?

    update: I replaced all the caps(excluding the tiny smd component ones that dont often fail), on the controller board, problem persists

    I think the chipset might be bad? I dunno

    Comment

    • Th3_uN1Qu3
      Believe in
      • Jul 2010
      • 6031
      • Romania

      #3
      Re: AOC 2236 LCD monitor, bad caps?

      If cleaning the ribbon cable between logic board and Tcon didn't help, try resoldering the large chip on the Tcon board.
      Originally posted by PeteS in CA
      Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
      A working TV? How boring!

      Comment

      • selldoor
        Slow Learner
        • Dec 2010
        • 7870

        #4
        Re: AOC 2236 LCD monitor, bad caps?

        Is this a dvd playing? or a game screenshot Can you post a still picture, not of a cartoon, that shows the problem. Reseat the graphics card on the pc?
        Test pc on another screen
        Last edited by selldoor; 01-14-2014, 04:11 AM.
        Please upload pictures using attachment function when ask for help on the repair
        http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • Th3_uN1Qu3
          Believe in
          • Jul 2010
          • 6031
          • Romania

          #5
          Re: AOC 2236 LCD monitor, bad caps?

          No, that's World of Warcraft if i'm not mistaken.
          Originally posted by PeteS in CA
          Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
          A working TV? How boring!

          Comment

          • senz_90
            Badcaps Veteran
            • Aug 2013
            • 328
            • Indonesia

            #6
            Re: AOC 2236 LCD monitor, bad caps?

            I like Dota

            I think selldoor suggest is good. sometimes it is hard to tell the problems from animation. get a good real picture. selldoor or the unique could lead the way. they are good and help me many times.
            "There is no shortcut to be successful. No pain, no gain."

            Best Regards
            Rudi
            Thank You

            Comment

            • darkcon
              New Member
              • Apr 2012
              • 5
              • New Zealand

              #7
              Re: AOC 2236 LCD monitor, bad caps?

              Sorry for the late reply, I think my email was sending things to the junk box

              and thanks for the replies

              is the tcon the board attached to the panel itself, or is that the main controller board

              yes its world of warcraft, that tree showed the problem clearly with a camera

              no its not the gfx card/computer, I've tested it on multiple systems, its deff the monitor

              I've tested with the vga and dvi cable, so its not bad connections at the cable end of thinks

              I've reflowed the mainboard(not sure if I already mentioned this)

              and I've cleaned the ribbon cable from the controller board to the panels pcb


              on my original post the top one is a camera pic showing the green squiggles

              the bottom one is a screenshot of the same scene, what it should look like

              I'm going to try resoldering the tcon chip
              Last edited by darkcon; 02-13-2014, 04:42 AM.

              Comment

              • bakro.istvan
                New Member
                • May 2014
                • 1
                • q

                #8
                Re: AOC 2236 LCD monitor, bad caps?

                Dear darkcon,

                my name is Steve, i am learning electrical engineering in Hungary.

                I have the same AOC 2236S LCD monitor. Mine is broken, some smoke come of it.

                I take it apart and the power board has been failed.
                I would like to ask darkcon to take a picture of the backise of the power board.

                I have two IC smoked and i cant read the name of it. I want to repair the monitor, because i dont have money for a new one.
                Here are the pictures of it

                https://drive.google.com/folderview?...Xc&usp=sharing

                Thanks in advance
                It will be a great help.
                Steve

                Comment

                • stj
                  Great Sage 齊天大聖
                  • Dec 2009
                  • 30979
                  • Albion

                  #9
                  Re: AOC 2236 LCD monitor, bad caps?

                  those ic's are FET's you may want to make sure there is nothing else bad that could have killed them.

                  Comment

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