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Viewsonic VA1616W driver board burned

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    #1

    Viewsonic VA1616W driver board burned

    Hi everyone, i connected my va1616w monitor to netbook and it burned components of the driver board in the vga port area, i think i bad connected the cable by mistake. After this the monitor power on but never receives signal from computer or any connected to vga port.

    I didn't find schematics of the driver board. Also i tried a universal lcd controller (mt6820-t) board with the panel but it was not supported. This is repairable or the board is dead? Thanks in advance. Images of the board:



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    #2
    Re: Viewsonic VA1616W driver board burned

    give it a good cleaning

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      #3
      Re: Viewsonic VA1616W driver board burned

      Originally posted by petehall347 View Post
      give it a good cleaning



      I found board schematic, what value would be r12 and r9?
      Last edited by r38_; 08-20-2022, 01:37 PM.

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        #4
        Re: Viewsonic VA1616W driver board burned

        The resistors are likely 75Ω, but they won't be the problem, I suspect the ic RTL2525LH that is connected to these lines has been destroyed. Buy a new replacement board from aliExp.
        Last edited by R_J; 08-20-2022, 02:50 PM.

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          #5
          Re: Viewsonic VA1616W driver board burned

          Originally posted by R_J View Post
          The resistors are likely 75Ω, but they won't be the problem, I suspect the ic that is connected to these lines has been destroyed. Buy a new replacement board from aliExp.
          I thought about it, but i didn't found any replacement board in aliexpress or other sites

          Comment

            #6
            Re: Viewsonic VA1616W driver board burned

            Is this not the same board? https://www.aliexpress.com/i/4001097110422.html, You may need to swap the spi ic U6

            Comment

              #7
              Re: Viewsonic VA1616W driver board burned

              Originally posted by R_J View Post
              Is this not the same board? https://www.aliexpress.com/i/4001097110422.html, You may need to swap the spi ic U6
              Yes, that's the same board. Unfortunately, the board + shipment + import costs, the final price is $60~, which i think is not worth it for a 15' lcd monitor.

              Anyway, thanks for the help!

              Comment

                #8
                Re: Viewsonic VA1616W driver board burned

                It seems odd to me that connecting the vga cable did this, there should only be video signals of around 1v p/p on these lines.

                Comment

                  #9
                  Re: Viewsonic VA1616W driver board burned

                  Most likely I connected the VGA cable to a hot one (the laptop was connected to the network via an adapter and the monitor was connected to the network).

                  Comment

                    #10
                    Re: Viewsonic VA1616W driver board burned

                    Have you checked the values of R9, R12 and R15? that may not be your problem. Check the voltage on (1_8AVCC1)1.8v and (3_3VCC1) 3.3v
                    Last edited by R_J; 08-20-2022, 06:01 PM.

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