HP Probook 445 G9 (DAX9SFMB8AO REV:A)

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  • astra45
    Member
    • Jan 2025
    • 11
    • Ukraine

    #1

    HP Probook 445 G9 (DAX9SFMB8AO REV:A)

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    Hello.
    The laptop does not recognize the battery. A component is missing on the board. Could you please tell me the type and value of the component, or share the schematic?
    Thanks.
    Kind regards.​
  • FriedFred
    Senior Member
    • May 2024
    • 137
    • Germany

    #2
    If you can not find anything at all, you can try with a resistor like 1 kOhm.
    Is there any voltage to measure?

    Comment

    • astra45
      Member
      • Jan 2025
      • 11
      • Ukraine

      #3
      I tried a 1 kOhm resistor right before writing, but it didn't change anything. There is no voltage. Everything was working fine until I accidentally damaged the resistor with a screwdriver while connecting the battery.

      Comment

      • mcplslg123
        Badcaps Legend
        • Jun 2015
        • 7262
        • india

        #4
        What is the voltage on both pads of this resistor?(resistor unsoldered).

        Resistor is connected to which pin of the dc jack?

        Comment

        • astra45
          Member
          • Jan 2025
          • 11
          • Ukraine

          #5
          There are 3,3v on the resistor contacts, the charger is connected.

          Click image for larger version

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          Comment

          • mcplslg123
            Badcaps Legend
            • Jun 2015
            • 7262
            • india

            #6
            This resistor seems like for dc jack light indicator and not AD_ID so may not be of concern.

            Laptop turns on with adapter only?/Battery only?/ both adapte+battery?

            The only issue is battery not being recognised?

            Battery was recognised before you repaired it?

            Please clarify

            Comment

            • astra45
              Member
              • Jan 2025
              • 11
              • Ukraine

              #7
              Laptop turns on with adapter only, not recognize the battery. There is no voltage on the battery contacts (black, red wires). I disconnected the battery for replacement RAM. The level of wear was​ 23% AIDA64. Please tell me what else I can check?

              Comment

              • FriedFred
                Senior Member
                • May 2024
                • 137
                • Germany

                #8
                Hmmm... if there is no boardview or schematics, it's quite difficult to find the correct resistor value.
                a) You can find out, where do the two nets come from, and where do they go to. Then we can consider what is the use of this signal.
                b) You can find out the pin assignments of the battery itself. Probably, there are other laptops which use the same battery. And then can find a schematics and boardview.
                I think it's worth to try from the direction of the battery itself.

                Comment

                • astra45
                  Member
                  • Jan 2025
                  • 11
                  • Ukraine

                  #9
                  Thank you all!
                  The 10 kOhm resistor came up.
                  I couldn't find the connection diagram.​

                  Comment

                  • hanhdo95
                    New Member
                    • Oct 2022
                    • 1
                    • viet nam

                    #10
                    Originally posted by astra45
                    Thank you all!
                    The 10 kOhm resistor came up.
                    I couldn't find the connection diagram.​
                    1.226 k0hm

                    Comment

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