[help] A1466 820-3437 NO AUDIO!!

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  • phantomEVO
    Badcaps Veteran
    • Mar 2013
    • 487
    • USA
    #1

    [help] A1466 820-3437 NO AUDIO!!

    P1V5S0SW_AUDIO_EN present

    PP1V5_S0SW_AUDIO present

    all diodes readings on j9500 present and perfect

    HDA_SDOUT R1313 33ohm
    HDA_SDOUT_R R1921 1kohm
    HDA_SYNC R1311 33ohm
    HDA_BIT_CLK R1310 33ohm

    HDA_RST_L present

    changed I/O Board and flat...no luck


    no audio peripheral avaible in the system

    maybe smc rework before by someone else

    any help?
    Tags: None
    • Kuroneox
      Member
      • Feb 2017
      • 24
      • México
      #2
      Re: [help] A1466 820-3437 NO AUDIO!!

      I don't know much English, but the audio failure of that model, for me, has been related to the flex, io board and board connector. really try changing io board

        Comment

        • reformatt
          Badcaps Legend
          • Feb 2020
          • 1398
          • Australia
          #3
          Re: [help] A1466 820-3437 NO AUDIO!!

          Audio codec is on the DC IN board. Try a PRAM reset first, then make sure you are using a known good DC IN board and flex cable.

          Often see corrosion at the base of J9500 too. Check signals at each pin like AUD_PWR_EN etc.

            Comment

            • phantomEVO
              Badcaps Veteran
              • Mar 2013
              • 487
              • USA
              #4
              Re: [help] A1466 820-3437 NO AUDIO!!

              I have Already changed dc board And flex like i said before…

              There is no corrosion on j9500

              Signal are present like i said

                Comment

                • piernov
                  Super Moderator
                  • Jan 2016
                  • 4435
                  • France
                  #5
                  Re: [help] A1466 820-3437 NO AUDIO!!

                  I think wrong SMC (from 3209) may cause no audio on these. Can try to reflash SMC firmware at least, or replace from another 3437.
                  OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                    Comment

                    • phantomEVO
                      Badcaps Veteran
                      • Mar 2013
                      • 487
                      • USA
                      #6
                      Re: [help] A1466 820-3437 NO AUDIO!!

                      How to re flash?

                        Comment

                        • reformatt
                          Badcaps Legend
                          • Feb 2020
                          • 1398
                          • Australia
                          #7
                          Re: [help] A1466 820-3437 NO AUDIO!!

                          Good point Piernov. I know that using a SMC from a 820-3437 donor for a 820-00165 board causes that.

                          Reflash the SMC firmware from https://github.com/MuertoGB/SMCTool/releases

                            Comment

                            • phantomEVO
                              Badcaps Veteran
                              • Mar 2013
                              • 487
                              • USA
                              #8
                              Re: [help] A1466 820-3437 NO AUDIO!!

                              Awesome? What type of Programmer should i use? Where can i find some tutorial?

                                Comment

                                • reformatt
                                  Badcaps Legend
                                  • Feb 2020
                                  • 1398
                                  • Australia
                                  #9
                                  Re: [help] A1466 820-3437 NO AUDIO!!

                                  It's a DMG file, just create a bootable USB with it and boot off it. Menu is pretty self explanatory. Further info here:

                                  https://www.youtube.com/watch?v=q8LEh8C4iYo

                                    Comment

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