MSI MS-14C4 - No power (MS14C41 Ver 3)

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  • tommy97
    Senior Member
    • Mar 2023
    • 151
    • United Kingdom
    #1

    MSI MS-14C4 - No power (MS14C41 Ver 3)

    Hi,

    I'm having a problem with MSI MS-14C4, no power 20v 0.1amp on the reader, no signs of liquid damage, if battery attached there is no difference. Area next to BQ gets very hot as well with PR305, PQ31 Drain 20V, Source 4.2v, Gate 5.2V about 4.1V, PQ30 Drain 4.2 V, Source 0V, Gate 2.2V.

    I've noticed that occasionally 2nd USB port goes to 5v - 0.1AMP, as soon re-connected comes back to 20V 0.1Amp any ideas? I couldn't find any schematics nor boardview.
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 13944
      • Canada
      #2
      Remove all power -> meter in resistance mode (not diode mode). Check the resistance to ground @ PC231. One meter probe @ PC231; other meter probe on the other side of PC231. One side of this capacitor is ground. If this cluster of parts is heating up then someone in this region is shorting and drawing too much current, resulting in heat generation.

      Click image for larger version Name: PC231.png Views: 391 Size: 213.5 KB ID: 3242107

        Comment

        • tommy97
          Senior Member
          • Mar 2023
          • 151
          • United Kingdom
          #3
          0.8MOhm on PC231, removed PC231 and 2 others next to it, same thing, after removing, when PR next to it is removed board does not heat up, 20v 0.6amp

            Comment

            • mcplslg123
              Badcaps Legend
              • Jun 2015
              • 7262
              • india
              #4
              PR305 is current sensing resistor?

                Comment

                • michoteuber
                  New Member
                  • Jul 2018
                  • 3
                  • Chile
                  #5
                  please someone send boardview

                    Comment

                    • SMDFlea
                      Super Moderator
                      • Jan 2018
                      • 20593
                      • UK
                      #6
                      Originally posted by michoteuber
                      please someone send boardview
                      https://www.badcaps.net/forum/troubl...f-this-section
                      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

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