Need Foto backside MSI ms-7e12 Ver:1.1

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  • ITFan
    Senior Member
    • Sep 2021
    • 68
    • Germany

    #1

    Need Foto backside MSI ms-7e12 Ver:1.1

    Hello dear forum participants.

    I have received a motherboard from a friend with the following problem, which I would like to solve.
    It is a MSI ms-7e12 mag tomahawk wifi VER: 1.1.
    On the back upper right corner near the exit panel a small chip has been hit (bent and some pads torn off)
    and I suspect a 3 pin sot-23 chip (possibly mosfet) nearby might have been hit as well.
    Would need a photo of the back of this area but from revision 1.1 as the 1.0 was slightly different from what I saw in videos on yt.
    But pictures say more than a thousand words. You can see exactly what it's all about.
    Boardview or schematic would also be great, but probably not available as rel new.
    There you would know exactly the designation of the 2 chips, one of which you can recognise, a 6pin . SMD code K27.
    Maybe someone can help me with a good picture of the back or BV, etc.

    Best regards and have a nice Sunday.
    ITFan
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  • Aliencomputres
    Senior Member
    • Aug 2019
    • 181
    • România

    #2
    You dont need foto backside.Clean area and restore tracks.

    Comment

    • ITFan
      Senior Member
      • Sep 2021
      • 68
      • Germany

      #3
      Hello aliencomputres,
      thanks for your message.
      of course I intend to do that, but on closer inspection you can see that an additional 3-pin SOT-23 chip (possibly N-channel mosfet) seems to be completely torn off.
      With a highres picture or Boardview or Schematic you would have the exact designation required to get a replacement and solder it back there after repairing the track.
      Best regards
      ITFan​

      Comment

      • Aliencomputres
        Senior Member
        • Aug 2019
        • 181
        • România

        #4
        hi
        so, after cleaning the respective portion you can follow the respective tracks under a microscope,and restore it!

        Comment

        • ITFan
          Senior Member
          • Sep 2021
          • 68
          • Germany

          #5
          Hello,
          yes so far clear, but how or how do I know which 3-pin chip is missing on the right without a circuit diagram or board view? I'm guessing a 2n7002 but would like to be sure.
          Best regards
          ITFan​

          Comment

          • DynaxSC
            Badcaps Veteran
            • Apr 2021
            • 449
            • Poland

            #6
            There is a radical way. Buy same board, check what you need, and give it back unused. Many online shops allow to do so for no reason.

            Comment

            • ITFan
              Senior Member
              • Sep 2021
              • 68
              • Germany

              #7
              Hi DynaxSC,

              hmm, that's a really radical method, that would be very unpleasant for me.
              Especially as I need exactly the revision 1.1 of the board, as I saw in Youtube videos during unboxing etc. that the 1.0 did not have a small mosfet at that point.
              Probably changed from 1.1 onwards.
              This makes the whole thing even more difficult, although it's only about small chips in the cent range. Without knowing what was there, it's really difficult.
              A correct Rev: version boardview could of course also help, but is very difficult to obtain with relatively new boards.
              I also think that maybe in the Tomahawk MAG series the part is more common there, as some things are the same within a series.
              Let's see, maybe time will help and something will happen in one direction.

              Best regards
              ITFan







              Comment

              • DynaxSC
                Badcaps Veteran
                • Apr 2021
                • 449
                • Poland

                #8
                Hi, you can also just try with a 2n7002, principally there are 5-6 options, eg. N or P mosfet, npn or pnp transistor or a dual diode with common cathode or anode. Most probable is 2n7002. The chance that something more will be demaged is very low, as these are all weak signals, so I would go for the risk. Then you have to test the board in each detail, to go sure everything is working correctly.
                Last edited by DynaxSC; 09-10-2024, 05:11 PM.

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