Macbook Air 820-000165-a

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  • marcelofct
    Senior Member
    • May 2019
    • 122
    • chile
    #1

    Macbook Air 820-000165-a

    Hello! I hope they are well, I need help with the motherboard mentioned in the title since it turns on, the fan turns but it does not chime I leave the voltages:
    PPBUS_G3H: 8.55v
    PPBUS_S5_HS_COMPUTING_ISNS
    : 8.55v
    PPDCIN_G3H_ISOL: 14.92v
    PPDCIN_G3H: 14.92
    PP3V42_G3H: 3.40
    PPVRTC_G3H: 3.29v
    PP5V_S5: 5 v
    PP5V_S4RS3: 5 v
    PP5V_S0: 5 v
    PP3V3_S0SW_SSD: 3.3
    PP3V3_S0SW_SSD: 3.3v
    PP3V3_S4_TBTAPWR: 3.29v
    PP1V8_S3: 1.74v
    PP1V2_S3: 1.17 v
    PP1V05_SUS: 1.03v
    PP1V5_S0: 1.48v
    PP0V6_S0_DDRVTT: 0.6
    PP1V05_S0: 1.02v
    PP1V05_S0SW_PCH_HSIO: 1.01v
    PPVCC_S0_CPU: 1.75v
    those are the voltages that I have, the smc is intervened
    I attach a photo

    I hope they help me

    regards
    Attached Files
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14022
      • Canada
      #2
      Re: Macbook Air 820-000165-a

      Can you try a PRAM reset on the unit ?

      Does the keycap led toggle on/off when you press that key ?


      https://www.lifewire.com/how-to-rese...process%20.%20

        Comment

        • marcelofct
          Senior Member
          • May 2019
          • 122
          • chile
          #3
          Re: Macbook Air 820-000165-a

          Originally posted by mon2
          Can you try a PRAM reset on the unit ?

          Does the keycap led toggle on/off when you press that key ?


          https://www.lifewire.com/how-to-rese...process%20.%20



          The pram was done I can turn it on from the power button, but the keycap light does not turn on
          probe external keyboard but does not turn on connect a mouse and turn on ,
          still without giving image
          Last edited by marcelofct; 04-30-2021, 02:01 PM.

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14022
              • Canada
              #4
              Re: Macbook Air 820-000165-a

              Do you have the lcd display attached during these tests? If yes, remove it and test again.

                Comment

                • marcelofct
                  Senior Member
                  • May 2019
                  • 122
                  • chile
                  #5
                  Re: Macbook Air 820-000165-a

                  Originally posted by mon2
                  Do you have the lcd display attached during these tests? If yes, remove it and test again.
                  I have done it with and without the screen, connect an external screen and it still does not give an image, is it something with the smc that was manipulated?

                    Comment

                    • mon2
                      Badcaps Legend
                      • Dec 2019
                      • 14022
                      • Canada
                      #6
                      Re: Macbook Air 820-000165-a

                      Sorry but do not have enough experience with this logic board...yet. Your voltage rails look to be correct. Maybe need to reflash your bios? Best to wait on some additional feedback.

                        Comment

                        • marcelofct
                          Senior Member
                          • May 2019
                          • 122
                          • chile
                          #7
                          Re: Macbook Air 820-000165-a

                          What happens is weird, I'll wait for more help, thank you very much for your time

                            Comment

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