Starting problem HP -dw1033dx LA-H325P

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  • Tend0
    E.E.C.S
    • Oct 2021
    • 92
    • Burkina Faso

    #1

    Starting problem HP -dw1033dx LA-H325P

    Hi there
    I leave it to you because out of ideas I don't know how to troubleshoot this computer
    Here I received the computer which did not turn on at all and no charging light
    After checking I quickly found that the main 19v line did not cross the 1st MOSFET and that it was burnt
    After replacing it I have the lights and the PC turns on after 3s and then turns off after a short circuit to ground
    I don't know where to check since I don't have a diagram or brd
    The card refs: FPW50 LA-H325P
    Thanks in advance
    Last edited by SMDFlea; 06-16-2022, 03:41 AM. Reason: english
  • mon2
    Badcaps Legend
    • Dec 2019
    • 14054
    • Canada

    #2
    Re: Problème de démarrage HP -dw1033dx

    What is the charger IC near this acfet ?

    Post the markings from the topside of the IC.

    Comment

    • Tend0
      E.E.C.S
      • Oct 2021
      • 92
      • Burkina Faso

      #3
      Re: Problème de démarrage HP -dw1033dx

      3h=8g

      Comment

      • Tend0
        E.E.C.S
        • Oct 2021
        • 92
        • Burkina Faso

        #4
        Re: Problème de démarrage HP -dw1033dx

        Après vérification le bios n'est pas alimenté j'ai pas les 3v3 sur le bios

        After checking the bios is not powered I do not have 3v3 on the bios
        .
        Last edited by SMDFlea; 06-16-2022, 04:25 AM. Reason: english

        Comment

        • SMDFlea
          Super Moderator
          • Jan 2018
          • 20737
          • UK

          #5
          Re: Problème de démarrage HP -dw1033dx

          Originally posted by Tend0
          Après vérification le bios n'est pas alimenté j'ai pas les 3v3 sur le bios
          Read your private messages please,post in english !!!!!!!!!!
          All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

          Comment

          • SMDFlea
            Super Moderator
            • Jan 2018
            • 20737
            • UK

            #6
            Re: Problème de démarrage HP -dw1033dx

            Originally posted by Tend0
            Après vérification le bios n'est pas alimenté j'ai pas les 3v3 sur le bios

            After checking the bios is not powered I do not have 3v3 on the bios
            .
            Is the bios chip 1.8V
            All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

            Comment

            • SMDFlea
              Super Moderator
              • Jan 2018
              • 20737
              • UK

              #7
              Re: Problème de démarrage HP -dw1033dx

              Originally posted by Tend0
              3h=8g
              Is it a capital H or lower case h ,post a picture of it
              All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

              Comment

              • lpraderi
                Member
                • Dec 2017
                • 30
                • Uruguay

                #8
                Re: Starting problem HP -dw1033dx LA-H325P

                LA-H325P uses BQ24725A Charger IC from Texas Instrument.
                You pointed to 3V3ALW/5VALW controller IC.

                Comment

                • mcplslg123
                  Badcaps Legend
                  • Jun 2015
                  • 7262
                  • india

                  #9
                  Re: Starting problem HP -dw1033dx LA-H325P

                  Follow simple basics:
                  01.Check resistance between
                  Source-Gate
                  Source-Drain
                  Gate-Drain
                  of both the dc-in fets.

                  02.Locate the CLR(Current sensing resistor) just after the 2 dc-in mosfets or near to charging IC. The location may vary but easily findable. Remove it from mb and then check resistance to GND on both pads of CLR.

                  Post your findings here.

                  Comment

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