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19 inch samsung powers off when VGA plugged in.

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    #1

    19 inch samsung powers off when VGA plugged in.

    Hi

    I have a 19 inch samsung LCD monitor which turns on ok, with power lights going and no signal message on screen. However as soon as I plug the VGA cable into the monitor, the backlights switch off and the monitor seems to just shut down. I have opened the monitor up and checked the capacitors. Most are Samxon and none of them are bulged. I have removed four of the large samxon capacitors from the low voltage side of the power supply and checked these on an RCL meter, all of them tested ok. Any ideas where to go now?

    Thanks

    Ed
    Tags: None
    #2
    Re: 19 inch samsung powers off when VGA plugged in.

    Originally posted by edharvey View Post
    Hi

    I have a 19 inch samsung LCD monitor which turns on ok, with power lights going and no signal message on screen. However as soon as I plug the VGA cable into the monitor, the backlights switch off and the monitor seems to just shut down.
    It would help to know what Samsung model.

    A clear focused set of pictures of all boards (top down, both sides) would help after reading this.

    https://www.badcaps.net/forum/showthread.php?t=1868

    Have you tried more than one source on the VGA port?
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    Comment

      #3
      Re: 19 inch samsung powers off when VGA plugged in.

      Hi

      The model is a SyncMaster 913V 19inch
      Here are some photos, the capacitors circled with green are all Samxon brand and have been checked.

      There is nothing wrong with the PC that I plugged into the monitor either, it has been used with many other monitors just fine.

      Thanks again

      Ed
      Attached Files

      Comment

        #4
        Re: 19 inch samsung powers off when VGA plugged in.

        Forgot to post pictures of the back, sorry about the quality, my cameras not great..
        Nothing much to see on the back of the logic board, no components and all solder joints are clean etc
        Attached Files

        Comment

          #5
          Re: 19 inch samsung powers off when VGA plugged in.

          Can you clear for my on second picture at righthand corner had burned mark?
          If so the VGA board is bad, had short to ground when you plug VGA cable & shut off monitor.

          Comment

            #6
            Re: 19 inch samsung powers off when VGA plugged in.

            You see the chip that says SE7889-LF?

            It is defective. There is no way to fix this monitor. Even if you replace the caps.
            "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

            -Leonid Brezhnev (On the Yom Kippur War)

            Comment

              #7
              Re: 19 inch samsung powers off when VGA plugged in.

              Thanks for the reply's, The top of the board does look like it is burnt in the photo however it is actually fine. Is it still likely that the chip is defective though?

              Comment

                #8
                Re: 19 inch samsung powers off when VGA plugged in.

                Originally posted by mockingbird View Post
                You see the chip that says SE7889-LF?

                It is defective. There is no way to fix this monitor. Even if you replace the caps.
                You could replace the chip though.

                Comment

                  #9
                  Re: 19 inch samsung powers off when VGA plugged in.

                  Read this article. Same exact problem - solution is what mockingbird said.

                  http://ezinearticles.com/?Samsung-71...blem&id=458167

                  This will be hard for a novice to replace. There is one chip being sold on ebay (ebay item number: 250646876175). That is, if you dare to try. But then again, the chip is being sold for $20. Is it worth $20 to fix this monitor?? MAYBE - Then again, it is a samsung!
                  The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

                  Comment

                    #10
                    Re: 19 inch samsung powers off when VGA plugged in.

                    Ok, thanks for all your messages guys. When I get home I will have a look at the board and make a call from then. I have a pretty decent soldering iron and have done quite a lot of soldering but I'm not sure if that will suffice!

                    Thanks again

                    Ed

                    Comment

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