HP PROBOOK 450 G8 DAX8QAMB8D0 REV : D Bios needed

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  • Vincovitch
    New Member
    • Oct 2022
    • 9
    • France

    #81
    Originally posted by volinakis

    did you take off bios chipset from motherboard? Or are you using clamps? Is not a good idea to use clamps, you'll have errors. if you also use Ch341A do 3-4 readings and compare them, when you have 2 identical it means you have a good backup.
    The BIOS is fine, but it's badly soldered on the board.
    Here are the backups.
    Attached Files

    if you find these attachements useful please consider making a small donation to the site

    Comment

    • volinakis
      Badcaps Legend
      • Jan 2021
      • 2887
      • N/A

      #82
      Originally posted by Vincovitch

      The BIOS is fine, but it's badly soldered on the board.
      Here are the backups.
      try. Write only main bios.
      Attached Files

      if you find these attachements useful please consider making a small donation to the site

      ----------------------------------------------------------------------------------------------------------------------------------------------------------------------
      https://www.badcaps.net/donate/
      ----------------------------------------------------------------------------------------------------------------------------------------------------------------------

      Comment

      • Vincovitch
        New Member
        • Oct 2022
        • 9
        • France

        #83
        Originally posted by volinakis

        try. Write only main bios.
        I just wrote the bios but the problem is the same as soon as I plug in the charger the fan starts running at full speed and the screen is black. Should I also write the EC?

        Comment

        • volinakis
          Badcaps Legend
          • Jan 2021
          • 2887
          • N/A

          #84
          Originally posted by Vincovitch

          I just wrote the bios but the problem is the same as soon as I plug in the charger the fan starts running at full speed and the screen is black. Should I also write the EC?
          try this EC. Count how many times charging led is blinking. And check soldering of bios chipsets.
          Attached Files

          if you find these attachements useful please consider making a small donation to the site

          ----------------------------------------------------------------------------------------------------------------------------------------------------------------------
          https://www.badcaps.net/donate/
          ----------------------------------------------------------------------------------------------------------------------------------------------------------------------

          Comment

          • Vincovitch
            New Member
            • Oct 2022
            • 9
            • France

            #85
            It flashes endlessly until the charger is removed.
            I just found a faulty component that's extremely necessary. It's a PU9502 (G2898). I ordered it to see if that's the problem.

            Comment

            • ub6ib969
              Badcaps Veteran
              • Jul 2010
              • 201

              #86
              Request: caps lock key on solid and power light flashes endless amber and white.
              Device: Laptop Brand: HP EliteBook Model: 450 G8 product
              id: 28K93UT
              SN: 5CD1277CYV
              MB: DAX8QAMB8D0 rev D

              I have attached both bios rom and ec rom. thanks in advance.
              Attached Files

              if you find these attachements useful please consider making a small donation to the site

              Comment

              • Vincovitch
                New Member
                • Oct 2022
                • 9
                • France

                #87
                Originally posted by volinakis

                try this EC. Count how many times charging led is blinking. And check soldering of bios chipsets.
                Hello, after changing the component the problem is still the same. I flashed the ec rom with the file you provided me above but it still doesn't work. Do you have any other idea?

                Comment

                • smallvhin
                  Senior Member
                  • Jul 2015
                  • 192
                  • philippines

                  #88
                  master pls help to repair my bios blinking caps lock and numLock key. more thanks
                  Hp ProBook 450 G8
                  DAX8QMB28A0 REV:A
                  SN: 5CD145DNWB
                  Attached Files

                  if you find these attachements useful please consider making a small donation to the site

                  Comment

                  • smallvhin
                    Senior Member
                    • Jul 2015
                    • 192
                    • philippines

                    #89
                    Originally posted by smallvhin
                    master pls help to repair my bios blinking caps lock and numLock key. more thanks
                    Hp ProBook 450 G8
                    DAX8QMB28A0 REV:A
                    SN: 5CD145DNWB
                    7 blinking caps lock and numLock key master🙏

                    Comment

                    • global1
                      Member
                      • Sep 2013
                      • 34
                      • Netherlands

                      #90
                      Hello everybody,
                      Can someone help me with removing 'ownership tag?

                      HP Probook 450 G8
                      DAX8QMB28A0 REV:A
                      SN: 5CD146D9Q0
                      Attached Files

                      if you find these attachements useful please consider making a small donation to the site

                      Comment

                      • danito
                        Badcaps Legend
                        • Jun 2016
                        • 1297
                        • Romania

                        #91
                        Originally posted by global1
                        Hello everybody,
                        Can someone help me with removing 'ownership tag?

                        HP Probook 450 G8
                        DAX8QMB28A0 REV:A
                        SN: 5CD146D9Q0
                        need Main backup not EC

                        Comment

                        • global1
                          Member
                          • Sep 2013
                          • 34
                          • Netherlands

                          #92
                          Here is the MAIN BIOS.

                          HP Probook 450 G8

                          DAX8QMB28A0 REV:A
                          SN: 5CD146D9Q0
                          Attached Files

                          if you find these attachements useful please consider making a small donation to the site

                          Comment

                          • global1
                            Member
                            • Sep 2013
                            • 34
                            • Netherlands

                            #93
                            Originally posted by global1
                            Here is the MAIN BIOS.

                            HP Probook 450 G8

                            DAX8QMB28A0 REV:A
                            SN: 5CD146D9Q0
                            Can someone help me remove the 'Ownership Tagl' from the system ID's?

                            HP ProBook 450 G8
                            DAX8QMB28A0 REV:A
                            SN: 5CD146D9Q0
                            Last edited by SMDFlea; 11-20-2025, 06:01 AM. Reason: bios removed, you already posted it.......

                            Comment

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