In search of T2 rom dump for iMAC 2017 A1862

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  • mon2
    Badcaps Legend
    • Dec 2019
    • 13852
    • Canada
    #1

    In search of T2 rom dump for iMAC 2017 A1862

    Hello all. Have an imac that is not able to create PP1v8_S5 and there are no shorts on the rail. Unable to DFU due to USB not working. Suspecting corruption of the T2 firmware.

    Welcome all suggestions. Thanks.
    Last edited by mon2; 08-13-2024, 08:29 PM.
    Tags: None
    • kevingill
      Senior Member
      • Jun 2013
      • 152
      • England
      #2
      Sorry, don't have the schematic/boardview. Is the chip that generates PP1v8_s5 looking OK? I presume the other S5 voltages are OK?

        Comment

        • mon2
          Badcaps Legend
          • Dec 2019
          • 13852
          • Canada
          #3
          Thanks. The pmic looks ok. Not shorted.

          Posted the power sequence here:

          https://www.badcaps.net/forum/troubl...-recovery-mode

          One thread noted the CD3215 maybe defective on the port being used for the DFU. The dfu requires the pch to be powered by S0 rails which are off.

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