Macbook bricked after OS uspdate

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  • Adenitz
    Senior Member
    • Jan 2021
    • 122
    • Congo
    #1

    Macbook bricked after OS uspdate

    Hello to all,

    I hope someone will be able to help me regarding the problem I have.
    I have Macbook Air 1466 early 2015 which I tried to update to Big Sur. Something along the way went terribly wrong and now I have a laptop that starts with fan at full speed (noisy) and no picture on the screen.
    Investigating I have found that both symptoms are reported as side effects of Big Sur update. I have tried with different key combinations to reset SMC and NVRAM, but that didn't change anything. SO even if the mobo is alive, the laptop is useless.
    Did anyone have similar problem? I have read that this update can even destroyed ROM memory or that IO board must be replaced.

    Do you have any advice? I didn't open the laptop, but I do have little experience with various electronics repairs.

    Thank you!
    Tags: None
    • MobileXT
      Senior Member
      • Oct 2012
      • 191
      • USA
      #2
      Re: Macbook bricked after OS uspdate

      Originally posted by Adenitz
      Hello to all,

      I hope someone will be able to help me regarding the problem I have.
      I have Macbook Air 1466 early 2015 which I tried to update to Big Sur. Something along the way went terribly wrong and now I have a laptop that starts with fan at full speed (noisy) and no picture on the screen.
      Investigating I have found that both symptoms are reported as side effects of Big Sur update. I have tried with different key combinations to reset SMC and NVRAM, but that didn't change anything. SO even if the mobo is alive, the laptop is useless.
      Did anyone have similar problem? I have read that this update can even destroyed ROM memory or that IO board must be replaced.

      Do you have any advice? I didn't open the laptop, but I do have little experience with various electronics repairs.

      Thank you!

      You need to repair the EFI ask for a clean dump at the BIOS section.

        Comment

        • Adenitz
          Senior Member
          • Jan 2021
          • 122
          • Congo
          #3
          Re: Macbook bricked after OS uspdate

          Does this mean that EFI chip must be desoldered from the logic board?

            Comment

            • MobileXT
              Senior Member
              • Oct 2012
              • 191
              • USA
              #4
              Re: Macbook bricked after OS uspdate

              Originally posted by Adenitz
              Does this mean that EFI chip must be desoldered from the logic board?
              Yes! you need to remove the EFI Chip and flash a working EFI.

                Comment

                • Adenitz
                  Senior Member
                  • Jan 2021
                  • 122
                  • Congo
                  #5
                  Re: Macbook bricked after OS uspdate

                  Thank you, I'll try to find someone with proper tools or knowledge. Thank you for your inputs.

                    Comment

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