Macbook Air 2020 (a2179) - touch id not working

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  • obelix24
    Badcaps Veteran
    • Jun 2023
    • 291
    • Slovakia
    #1

    Macbook Air 2020 (a2179) - touch id not working

    Hi i have one Macbook Air 2020 where touch ID is not working (it's not scanning fingerprints). Touch ID was working before, there is no error message during scanning fingerprint it's just not scanning on screen you can see only fingerprint but there are no red updates as when it's working. Power button is working fine.

    I've checked boardview and also schematics but i'm not able to find anything related to TouchID ... i have similar issue on a2338 where there was problem with PP3V0_TOUCHID​ and after replacing UT610 it was working but here i'm not able to find anything related to TouchID is it fully operated by audio board ?
    Tags: None
    • obelix24
      Badcaps Veteran
      • Jun 2023
      • 291
      • Slovakia
      #2
      any idea ?

        Comment

        • mon2
          Badcaps Legend
          • Dec 2019
          • 14685
          • Canada
          #3
          See if this helps (assuming it is not a hardware failure):

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

            Comment

            • obelix24
              Badcaps Veteran
              • Jun 2023
              • 291
              • Slovakia
              #4
              this is not my case as i don't have fingerprints there. when i click on add fingerprint it normally opens window with scanning but it doesn't scan my fingerprint. it's not recognizing my finger on the button itself. so to me it looks like hardware issue somewhere on the board but as i'm not able to find any traces for touch i don't know where to measure.

                Comment

                • mon2
                  Badcaps Legend
                  • Dec 2019
                  • 14685
                  • Canada
                  #5
                  How did this unit go from working to a non-working state?

                    Comment

                    • obelix24
                      Badcaps Veteran
                      • Jun 2023
                      • 291
                      • Slovakia
                      #6
                      there was water damage in audio board so i replaced it with another one and it was working some time and then it stopped (touch id) power button is responding only issue is the touch id. I'm trying to find any schematics for this audio board but nothing online

                        Comment

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