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hp probook 430 g4 DA0X81MB6E0 rev:E

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    hp probook 430 g4 DA0X81MB6E0 rev:E

    hi, a liquid has entered this notebook, I have noticed some signs of oxidation on some chips, I have cleaned up the affected part, when I connect the adapter it turns on immediately without pressing the on / off button the caps lock and number lock keys emit 5 long flashes and then the fan starts to turn to maximum, if I press on / off it turns off, then the next time it is turned on it flashes as mentioned above, any idea?
    thank you

    #2
    Re: hp probook 430 g4 DA0X81MB6E0 rev:E

    https://h30434.www3.hp.com/t5/Notebo...on%20your%20PC.

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      #3
      Re: hp probook 430 g4 DA0X81MB6E0 rev:E

      No one can give advise based on symptoms only. You need to give measurements, details the steps you have taken etc etc. A good detailed description with measurements will always get attention and response.

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        #4
        Re: hp probook 430 g4 DA0X81MB6E0 rev:E

        this MB:HP 440 G4-DA0X81MB6E0 REV E does not turn on but when I put the multimeter to PWRBTN# and plug in the charger and press the button it turns on. if I turn it off and remove the multimeter, it does not turn on. anyone have a solution please.

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          #5
          Re: hp probook 430 g4 DA0X81MB6E0 rev:E

          Review the charge capacitor @ C313. Replace it and test again. The value is not critical so any value, even 22uf, etc. is ok.
          Attached Files

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            #6
            Re: hp probook 430 g4 DA0X81MB6E0 rev:E

            I changed C313 it didn't work, I also changed Q36 and Q37 nothing.

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              #7
              Re: hp probook 430 g4 DA0X81MB6E0 rev:E

              Measure the voltage to ground of PWRBTN#.

              Measure while the switch is open.

              Hold down the power switch and measure again.

              Release the switch and measure again.

              Post each measurement.

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                #8
                Re: hp probook 430 g4 DA0X81MB6E0 rev:E

                I found when I do the same thing with the multimeter on BAT_GRNLED# or AMBER_BATLED# or LIMIT_SIGNAL. The pc turns on but all the voltages are good except VCCGT.

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                  #9
                  Re: hp probook 430 g4 DA0X81MB6E0 rev:E

                  nobody has a solution, the last thing i found all the voltages are fixed just AMBER_BATLED# which fluctuates between 3.09 and 3.42 V. the resistors are good on this line.

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