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SAMSUNG NP350V5C-S04RU no ppower response

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    #1

    SAMSUNG NP350V5C-S04RU no ppower response

    Hi I have a samsung that has no display at first now I tried to clear cmos reset then after that the unit has no power taking only 9miliamp on the powersupply, then I tried to flashed the bios it was same..

    What maybe the issue of this laptop?

    QCLA4 LA-8861P REV 1.0

    backup bios
    attched

    If someone has a schematic also
    Last edited by SMDFlea; 03-04-2023, 04:25 PM. Reason: bios requests go here -> https://www.badcaps.net/forum/forumdisplay.php?f=40
    Tags: None
    #2
    Re: SAMSUNG NP350V5C-S04RU no ppower response

    Post your bios here for update/clean : https://www.badcaps.net/forum/forumdisplay.php?f=40

    Comment

      #3
      Re: SAMSUNG NP350V5C-S04RU no ppower response

      Originally posted by kalilinux25 View Post
      Hi I have a samsung that has no display at first now I tried to clear cmos reset then after that the unit has no power taking only 9miliamp on the powersupply, then I tried to flashed the bios it was same..

      What maybe the issue of this laptop?

      QCLA4 LA-8861P REV 1.0

      backup bios
      attched

      If someone has a schematic also
      I am not an expert like you but i did the same steps first i checked cmos reset it worked for one time only again issue appeared i flashed the bios but still no display and after 1min while checking coils no power issue i am still looking for solution

      Comment

        #4
        Re: SAMSUNG NP350V5C-S04RU no ppower response

        have you find problem? i have this problem and i 'm crazy

        Comment

          #5
          Re: SAMSUNG NP350V5C-S04RU no ppower response

          Originally posted by e1070 View Post
          have you find problem? i have this problem and i 'm crazy
          Npe issue was not solve

          Comment

            #6
            Re: SAMSUNG NP350V5C-S04RU no ppower response

            With the very low current draw, the laptop is not passing through the main power rail voltage.

            Start with the dcin connector and confirm the voltage to ground of the adapter. It should be ~19v.

            Next carefully review the DCin mosfets and the charger IC at pu200. A website with the schematics are available on this forum.

            Pu200 is a common charger IC from TI and is the BQ series.

            So really interested in the following voltages to ground:

            REGN
            ACDRV
            ACOK
            ACDET

            On pu200. Post each measurement.

            Comment

              #7
              Re: SAMSUNG NP350V5C-S04RU no ppower response

              Originally posted by mon2 View Post
              With the very low current draw, the laptop is not passing through the main power rail voltage.

              Start with the dcin connector and confirm the voltage to ground of the adapter. It should be ~19v.

              Next carefully review the DCin mosfets and the charger IC at pu200. A website with the schematics are available on this forum.

              Pu200 is a common charger IC from TI and is the BQ series.

              So really interested in the following voltages to ground:

              REGN
              ACDRV
              ACOK
              ACDET

              On pu200. Post each measurement.
              This unit was already retun to the owner sir hope you can check my latest thread sir badly need help
              about that.

              Comment

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