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Pin 8 on the bios is shorted to ground

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    Pin 8 on the bios is shorted to ground

    Fellow brothers

    Kindly assist with the Following:
    MSI Gaming Laptop
    Model number: MS-1799
    Motherboard no:MS - 16J91
    VER: 1.0

    The bios chip is shorted, i removed the bios chip from the board but short is still there, pin 8 of the bios chip which I believe it 3.3v it shorted to ground, pin 1 and pin 2 are shorted to ground as well, pin 5 and 6 as well

    I injected 3.3v on pin 8, nothing is getting hot on the board, i even limited the current to 4 Amps but still nothing is getting hot

    Again there is coil which is shorted straight to ground, I believe it 3.3v output, still when i inject 1v there nothing is getting hot yet the board is taking 4 Amps

    Im totally confused

    Can someone help me please .
    Last edited by SMDFlea; 05-21-2020, 05:10 AM.

    #2
    Re: Pin 8 on the bios is shorted to ground

    Check if PCH die warms up when injecting on 3.3V rail.
    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

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      #3
      Re: Pin 8 on the bios is shorted to ground

      You should observe a warming up of component at least, unless the short is below 1 ohms. Also replace the wire you use for injecting 3.3v. You need a larger diameter wire or else, nothing will heat up.
      Last edited by whaldsz; 05-21-2020, 07:58 AM. Reason: correction

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        #4
        Re: Pin 8 on the bios is shorted to ground

        Originally posted by whaldsz View Post
        You should observe a warming up of component at least, unless the short is below 1 ohms. Also replace the wire you use for injecting 3.3v. You need a larger diameter wire or else, nothing will heat up.
        highly agreed, im gonna use a larger wire, it 000, straight to ground and my wire is getting hot instead, im gonna change my wire tomorrow and update you guys

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          #5
          Re: Pin 8 on the bios is shorted to ground

          Originally posted by piernov View Post
          Check if PCH die warms up when injecting on 3.3V rail.
          thank you so much my brother, i did that, i even removed the heat sink and poured alcohol, no movement and nothing heating up

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            #6
            Re: Pin 8 on the bios is shorted to ground

            Check again if your wire is heating up. Shorten your wire if possible. Inspect using microscope if you have, could be a shorted large cap or the PCH is busted. You might need to leave it for 5-15 min and get back to it to check which area is warming up.

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              #7
              Re: Pin 8 on the bios is shorted to ground

              Agreed with others opinion-very likely its shorted PCH.

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