MacbookPro A1398 (820-3332-A) auto-start on battery no initialization

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  • skynet85
    Senior Member
    • Jul 2015
    • 124
    • Georgia

    #1

    MacbookPro A1398 (820-3332-A) auto-start on battery no initialization

    Hello everyone, tell me where to dig already tired. It turns on only when the battery is connected, after I connect the charging, according to the multimeter readings, the charge goes on, there is no gong, the backlight turns on for a short time then goes out, I flashed the BIOS with a clean ME while preserving the old one, it didn't help, transferred the u7000 of another board just in case also nothing, removed the SMC there were suspicious contacts,then the SMC soldered on new balls, for example, after turning it on, it does not respond to the shutdown button, measurements showed that the keyboard is intact and the voltage sags. measurements after connecting the battery .
    =PP5V_S4_REG L7220 5v

    =PP3V3_S5_REG L7260 3.3v

    =PPBUS_G3H L7030 12v

    =PP1V5R1V35_GPU_REG L8360 1.3V

    =PP1V05_S0GPU_REG L8310 1.0V

    =PP1V8_S0_REG L7720 1.8V

    =PPVCCSA_S0_REG L7100 0.8V

    =PPCPUVCCIO_S0_REG L7630 1V CPU VCCIO

    =PPPCHVCCIO_S0_REG L9830 1V PCH VCCIO

    =PPDDR_S3_REG L7330 1.3V DDR3 SUPPLY

    Thanks for helps
  • mon2
    Badcaps Legend
    • Dec 2019
    • 13887
    • Canada

    #2
    Re: MacbookPro A1398 (820-3332-A) auto-start on battery no initialization

    =PPBUS_G3H L7030 12v
    What is the EXACT voltage here ?

    Comment

    • skynet85
      Senior Member
      • Jul 2015
      • 124
      • Georgia

      #3
      Re: MacbookPro A1398 (820-3332-A) auto-start on battery no initialization

      Originally posted by mon2
      What is the EXACT voltage here ?
      only witch AC adaptor 12,28v (don't start), only witch battery 12,38v. how much should be . Thanks

      Comment

      • mon2
        Badcaps Legend
        • Dec 2019
        • 13887
        • Canada

        #4
        Re: MacbookPro A1398 (820-3332-A) auto-start on battery no initialization

        See here & attached:

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

        So the SMC has not yet boosted this voltage.

        Could be a SMC communication fault...

        See attached.

        Measure and post the VOLTAGE readings for:

        SMBUS_CHGR_SCL
        SMBUS_CHGR_SDA
        Attached Files

        Comment

        • skynet85
          Senior Member
          • Jul 2015
          • 124
          • Georgia

          #5
          Re: MacbookPro A1398 (820-3332-A) auto-start on battery no initialization

          SMBUS_CHGR_SCL
          SMBUS_CHGR_SDA
          [/QUOTE]

          only with charger 3.4v only with battery

          tell me on this model should be sms LM4FS1BH ?
          Last edited by skynet85; 06-14-2022, 06:12 AM.

          Comment

          • mon2
            Badcaps Legend
            • Dec 2019
            • 13887
            • Canada

            #6
            Re: MacbookPro A1398 (820-3332-A) auto-start on battery no initialization

            Are you testing with an original 85W magsafe 2 power adapter ?

            Follow this thread and continue to post your updates:

            https://boards.rossmanngroup.com/threads/a1398.62533/

            Comment

            • skynet85
              Senior Member
              • Jul 2015
              • 124
              • Georgia

              #7
              Re: MacbookPro A1398 (820-3332-A) auto-start on battery no initialization

              I will read the article from boards.rossmanngroup.com
              checked voltages from that forum:
              SMC_BC_ACOK 3.46

              =PP3V3_SUS_FET 3V3_SUS 0v

              =PPBUS_G3H on R6905 15.14v

              =PP3V3_S5_REG 3.3v

              3V3_SUS 0v

              Comment

              • mon2
                Badcaps Legend
                • Dec 2019
                • 13887
                • Canada

                #8
                Re: MacbookPro A1398 (820-3332-A) auto-start on battery no initialization



                Q1: Are you testing with an original 85W magsafe 2 power adapter ?


                Q2 : What is the voltage of PM_BATLOW_L ?

                PPBUS_G3H on R6905 15.14v
                Seems high. What is the voltage again @ F7040 ?

                Maybe you are measuring the voltage on R6920 ?
                Attached Files
                Last edited by mon2; 06-14-2022, 09:45 AM.

                Comment

                • skynet85
                  Senior Member
                  • Jul 2015
                  • 124
                  • Georgia

                  #9
                  Re: MacbookPro A1398 (820-3332-A) auto-start on battery no initialization

                  sorry didn't have time. yes, before that I used a 45 watt adapter and when connected it was orange, today I found 85 watts and when connected there was an orange indicator, then after reconnecting it does not light up. Now ADAPTER_SENSE 12.2 ,PM_BATLOW_L 0v
                  R6905 PPBUS_G3H 12.2

                  Comment

                  • mon2
                    Badcaps Legend
                    • Dec 2019
                    • 13887
                    • Canada

                    #10
                    Re: MacbookPro A1398 (820-3332-A) auto-start on battery no initialization

                    From Rossmann forums:

                    BATLOW is often missing because of bad/incorrect charger....

                    See attached.

                    reference:
                    https://www.it-tech.com.au/mac-q-a/pm-slp-s4-l-timing/
                    PPBUS_G3H 12.2
                    This means the SMC has not properly boosted the PPBUS_G3H regulator @ U7000.

                    Check the voltage of:

                    SMBUS_CHGR_SCL
                    SMBUS_CHGR_SDA


                    Post the measurements.

                    Update:

                    10. PM_BATLOW_L (BATLOW#) if the battery voltage is NOT low, or no battery is connected, SMC will output 3.3V to inform CPU/PCH. 3.3V ok
                    reference:
                    https://logi.wiki/index.php/PM_SLP_S...roubleshooting
                    Last edited by mon2; 06-17-2022, 09:34 AM.

                    Comment

                    • skynet85
                      Senior Member
                      • Jul 2015
                      • 124
                      • Georgia

                      #11
                      Re: MacbookPro A1398 (820-3332-A) auto-start on battery no initialization

                      Thanks for the links, studying.

                      SMBUS_CHGR_SCL jamps from 3.14v to 3.46v
                      SMBUS_CHGR_SDA jamps from 3.16v to 3.46v

                      Comment

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