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Alienware 13 R3 repair - power issue or bad super-IO?

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  • Nikan.e
    Member
    • Nov 2023
    • 20
    • Germany
    #1

    Alienware 13 R3 repair - power issue or bad super-IO?

    Greetings and Salutations!

    I have BAP00 board in front of me, which does not want to turn on. Nothing except for the AC power is connected.

    +3VLP - present
    RTC power - present // no battery connected

    * +3VALW - present
    * +5VALW - present

    * +LAN_IO - 0.00V
    * +3V_PCH - 0.05V
    * +1VALW - 0.00V
    * +1V_PCH_PRIM - 0.00V // same rail as +1VALW

    Note : ON* means that this power plane is ON only with AC power available, otherwise it is OFF

    +1VALW - 47Ohms
    +3V_PCH - MOhm range
    +LAN_IO - 100KOhm range

    I guess that since the power cord is connected and the PCH_PWR_EN signal from the GPIO-107 pin of the KB9022QD is not present, the chip might be faulty. How can I verify my assumption?
    What else could be wrong?

    Thanks in advance and best regards from Germany!
    Tags: None
    • Nikan.e
      Member
      • Nov 2023
      • 20
      • Germany
      #2
      Originally posted by Nikan.e
      I guess that since the power cord is connected and the PCH_PWR_EN signal from the GPIO-107 pin of the KB9022QD is not present, the chip might be faulty. How can I verify my assumption?
      My bad,
      * +3VALW - present
      * +5VALW - present
      are turned on by the super-IO.

        Comment

        • Nikan.e
          Member
          • Nov 2023
          • 20
          • Germany
          #3
          Originally posted by Nikan.e

          My bad,
          * +3VALW - present
          * +5VALW - present
          are turned on by the super-IO.
          Nonsens, the super IO is powerd by +3VALW, I do not know what I traced back on the pcb to write what I earlier postet.

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 15863
              • Canada
              #4
              Power adapter is the original for this unit?

              Have you tested with a known good bios for this board? Be sure to backup the original before reflashing.

                Comment

                • SMDFlea
                  Super Moderator
                  • Jan 2018
                  • 23614
                  • UK
                  #5
                  Originally posted by Nikan.e

                  Nonsens, the super IO is powerd by +3VALW, I do not know what I traced back on the pcb to write what I earlier postet.
                  Post links to the schematic/boardview, they are already posted in the schematic requests section https://www.badcaps.net/forum/troubl...f-this-section

                    Comment

                    • Nikan.e
                      Member
                      • Nov 2023
                      • 20
                      • Germany
                      #6
                      Originally posted by mon2
                      Power adapter is the original for this unit?

                      Have you tested with a known good bios for this board? Be sure to backup the original before reflashing.
                      I do not have the original adapter, but I have a very similar one from Dell.
                      No flash is being powered, except for the UT2, which is connected to the TPS65982 USB-C controller.

                        Comment

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