A1990 cant install OS after SSD nand repalced

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  • sajidmirza
    Member
    • Aug 2021
    • 24
    • india
    #1

    A1990 cant install OS after SSD nand repalced

    Hi all,
    Got A1990 with ssd nand ic shorted.Repalced all the nand ic from same donor board.Restored in apple configurator successfuly and booted to recovery.Its high siera recovery.But when i try to insatll OS from internet recovery it gives error "Recovery server could not be contacted".tried at different places thinking of low internet but still getting same error.Tried date adjustment from terminal also.
    i have heard that we cant install OS from high siera recovery at the moment.Is it true.If yes how to update recovery to latest one.tried to restore several times from AC2 but still getting same high siera reacovry.
    Cant install from external drive as it is security protected.
    Can any guide how to install OS in this mac.
    Tags: None
    • anhbanxoi
      Senior Member
      • Sep 2021
      • 170
      • VN
      #2
      Re: A1990 cant install OS after SSD nand repalced

      Try with Cmd + Opt + R to install lastest macos version.

        Comment

        • sajidmirza
          Member
          • Aug 2021
          • 24
          • india
          #3
          Re: A1990 cant install OS after SSD nand repalced

          tried several times but it still boots to high siera recovery.

            Comment

            • kevingill
              Senior Member
              • Jun 2013
              • 152
              • England
              #4
              Re: A1990 cant install OS after SSD nand repalced

              Have you tried any other versions of MACOS from a USB stick?

                Comment

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                  mb code:820-01827-A;
                  sn:C02Z349ALVDR;
                  i9 32GB Ram 1TB

                  Hi, I found short on one of 6 black nand (total 1TB).
                  i removed all 6 nand ( voltages all ok) and now i want to program with JC P15 but for A1990 2019 there is only 512GB configuration.
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