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macbook retina A1398 820-00138 works slowly

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    macbook retina A1398 820-00138 works slowly

    Hi, ;-)
    i am trying to understand what is happening to this macbook retina 15 A1398 from 2015 year with logic 820-00138.
    The macbook had a swollen battery, it seemed to explode, removed the battery the macbook has power, starts without errors but is very slow, very slow. From resource monitoring all cpu cores work very high even without applications started.
    I tried another trackpad flat, I disconnected the webcam, I disconnected the wifi card, I tried another IO board, I tried with more SSD hard drives.
    I did apple hardware test, no errors, checked all sensors and temperatures are ok, has no damaged components, carefully observed under microscope, could it be bad SMC?
    I made the following measurements:
    PPBUS_G3H 12,60v
    PPVIN_S5_HS_COMPUTING_ISNS 12,60v
    PPVIN_S5_HS_OTHER3V3_ISNS 12,60
    PPVIN_S5_HS_OTHER5V_ISNS 12,60
    PPDCIN_G3H 18
    PPDCIN_G3H_ISOL 18
    PP3V42_G3H 3,4
    PPVRTC_G3H 3,3
    PP5V_S5 5
    PP5V_S4 5
    PP5V_S3 5
    PP5V_S0 5
    PP3V3_S5 3,3
    PP3V3_S4 3,3
    PP3V3_SUS 3,3
    PP3V3_S3 3,3

    #2
    Re: macbook retina A1398 820-00138 works slowly

    https://www.ifixit.com/Answers/View/...t+battery+swap

    Comment


      #3
      Re: macbook retina A1398 820-00138 works slowly

      MacBooks require a good battery to work properly.
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

      Comment


        #4
        Re: macbook retina A1398 820-00138 works slowly

        forgive my inexperience, so if I start it now with no battery connected will it work slowly?

        Comment


          #5
          Re: macbook retina A1398 820-00138 works slowly

          https://logi.wiki/index.php/Throttling
          OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

          Comment


            #6
            Re: macbook retina A1398 820-00138 works slowly

            thanks for the information, they were very useful, however the problem remained, I tried an original and working battery and even with this connected it does not start. It sees the battery and the remaining charge but if I turn off the power it turns off completely, as if it were not connected.

            Comment


              #7
              Re: macbook retina A1398 820-00138 works slowly

              It sees the battery and the remaining charge but if I turn off the power it turns off completely
              ?? If you remove the external and original power adapter, the logic board will turn OFF even if you have the battery connected ?

              Comment


                #8
                Re: macbook retina A1398 820-00138 works slowly

                Originally posted by mon2 View Post
                ?? If you remove the external and original power adapter, the logic board will turn OFF even if you have the battery connected ?
                yes, if I turn off the power, it turns off. when it is on it sees the battery and the remaining charge

                Comment


                  #9
                  Re: macbook retina A1398 820-00138 works slowly

                  Using the battery ONLY (no power adapter) - meter in DC volts (20v scale is ok), check the attached points of interest.

                  Measure each and post the readings.
                  Attached Files

                  Comment


                    #10
                    Re: macbook retina A1398 820-00138 works slowly

                    f7140 pin n2 12,30v
                    q7155 pin 5 12,30v
                    c7145 pin 1 12,30v
                    r7150 pin 1-3 12,30v

                    unfortunately the scheme is different from the logic board, I am attaching a photo, I hope I have measured well
                    Attached Files

                    Comment


                      #11
                      Re: macbook retina A1398 820-00138 works slowly

                      f7140 pin n2 12,30v
                      PPBUS_G3H is too low. This means that the SMC has not boosted the value with the battery only case.

                      reference:
                      https://www.logi.wiki/index.php?title=PPBus_G3H

                      See attached. Check the voltage on D7050 dual ESD diode with the battery ONLY attached.
                      Attached Files

                      Comment


                        #12
                        Re: macbook retina A1398 820-00138 works slowly

                        You asked to measure on battery not AC adapter.
                        OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                        Comment


                          #13
                          Re: macbook retina A1398 820-00138 works slowly

                          Originally posted by mon2 View Post
                          PPBUS_G3H is too low. This means that the SMC has not boosted the value with the battery only case.

                          reference:
                          https://www.logi.wiki/index.php?title=PPBus_G3H

                          See attached. Check the voltage on D7050 dual ESD diode with the battery ONLY attached.
                          d7050 pin 1 3,4v pin 2 3,4v only whit battery

                          Comment


                            #14
                            Re: macbook retina A1398 820-00138 works slowly

                            Readings are ok.

                            What is the voltage of SMC_RESET_L ?

                            Comment


                              #15
                              Re: macbook retina A1398 820-00138 works slowly

                              Originally posted by mon2 View Post
                              Readings are ok.

                              What is the voltage of SMC_RESET_L ?
                              SMC_RESET_L 3,4v

                              Comment


                                #16
                                Re: macbook retina A1398 820-00138 works slowly

                                Originally posted by sdogs View Post
                                SMC_RESET_L 3,4v
                                maybe u7100 defective due to overcharging battery that has swollen?

                                Comment


                                  #17
                                  Re: macbook retina A1398 820-00138 works slowly

                                  update:

                                  after a rework on the SMC chip everything works very well, even without AC power supply it stays on, the cpu cores work regularly, it works !!!!!



                                  Thank you very much for helping me ;-)

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