Asus VE247H problem

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  • FrankMtl
    Member
    • Sep 2015
    • 36
    • Canada

    #1

    Asus VE247H problem

    Hi, I found this broken monitor.
    It`s starts up and turn off about 5 seconds after.
    There is also a small red vertical lines.
    All the caps and soldering look good.
    Should I change the caps anyway?

    Here is the caps list
    On the main PS 330uf 35v x2,680uf 16v x2,22uf 50v
    On the driver 22uf 100v x2,220uf 25v x 2
    On the video board 220uf 16v x2, 22uf 25v x3,10uf 25v


    Thanks.
    Frank.
    Attached Files
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 30917
    • Albion

    #2
    Re: Asus VE247H problem

    check the diodes in 2 pairs with the empty space next to each pair.

    putting diodes in parallel is a stupid trick that often fails - just search this forum for "vestel" to see lots of examples.

    Comment

    • FrankMtl
      Member
      • Sep 2015
      • 36
      • Canada

      #3
      Re: Asus VE247H problem

      Thanks, I guess I have to desolder the diodes to test them right?
      I tried to test them on the board and I get an voltage from both ends.
      Last edited by FrankMtl; 12-23-2016, 10:46 AM.

      Comment

      • stj
        Great Sage 齊天大聖
        • Dec 2009
        • 30917
        • Albion

        #4
        Re: Asus VE247H problem

        test them on the board for resistance - if they arent short-circuit then they are o.k.

        Comment

        • FrankMtl
          Member
          • Sep 2015
          • 36
          • Canada

          #5
          Re: Asus VE247H problem

          Hi, can you help with this procedure?
          I have a cheap multimeter that is not autoranging.
          What values should I get ?
          Thanks.

          Frank.

          Comment

          • FrankMtl
            Member
            • Sep 2015
            • 36
            • Canada

            #6
            Re: Asus VE247H problem

            I think I figure it out. I use the 200 setting on my multimeter
            and got 1 fro mon side and voltage on the other on all diodes.
            What`s next to check?

            Frank.

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 30917
              • Albion

              #7
              Re: Asus VE247H problem

              voltage?
              your supposed to test the diodes with the power off!!!!!!

              Comment

              • FrankMtl
                Member
                • Sep 2015
                • 36
                • Canada

                #8
                Re: Asus VE247H problem

                Yes lol sorry, wrong term.
                Power was off.

                Francois.

                Comment

                • FrankMtl
                  Member
                  • Sep 2015
                  • 36
                  • Canada

                  #9
                  Re: Asus VE247H problem

                  Hi, I check all resistors diodes and caps, they test all good.
                  I also check and clean the ribbon cable.

                  I have this vertical red line.

                  Video Board issue?

                  Thanks.

                  Frank.
                  Attached Files

                  Comment

                  • stj
                    Great Sage 齊天大聖
                    • Dec 2009
                    • 30917
                    • Albion

                    #10
                    Re: Asus VE247H problem

                    red line???
                    i see a white "cloud" only

                    Comment

                    • FrankMtl
                      Member
                      • Sep 2015
                      • 36
                      • Canada

                      #11
                      Re: Asus VE247H problem

                      Here is a better picture.

                      Frank.
                      Attached Files

                      Comment

                      • stj
                        Great Sage 齊天大聖
                        • Dec 2009
                        • 30917
                        • Albion

                        #12
                        Re: Asus VE247H problem

                        if it's always in the same place, it could be the panel.

                        Comment

                        • FrankMtl
                          Member
                          • Sep 2015
                          • 36
                          • Canada

                          #13
                          Re: Asus VE247H problem

                          Yes always at the same place.

                          Comment

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