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Macbook Air 820-000165-a

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    #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
    #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

      #3
      Re: Macbook Air 820-000165-a

      Originally posted by mon2 View Post
      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

        #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

          #5
          Re: Macbook Air 820-000165-a

          Originally posted by mon2 View Post
          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

            #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

              #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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