820-00850 stuck 20v 0.230a help!

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  • marcelofct
    Senior Member
    • May 2019
    • 122
    • chile

    #1

    820-00850 stuck 20v 0.230a help!

    I have this macbook 820-00850 it does not turn on, it is stuck at 20v 0.260~0.220a and it restarts
    I checked u9080 in pin 1 diode mode and it was short-circuited, I changed it, the short went away but I did not have 12v on pin 1-5-9-13-17-21, I had 0.9v or 3v, remove the ic, connect the charger and I had 12v, I continued checking and in resistor R9082 it had 1.7v and not 2.7v check that line that comes from u9000 pin 45 SSD0_VR_P2v7_EN I reballed and nothing changed
    in summary
    I do not have 2v7 enabled in the R9082 resistor, u9080 does not have 12v, check again and in
    L9080 and L9081 I have a short 1v socket I see that it heats up U8900 which is an SSD, if someone can help me it would be great, I hope what I wrote is not so confusing
    Attached Files
    Last edited by marcelofct; 08-10-2023, 03:19 PM. Reason: ERROR
  • mon2
    Badcaps Legend
    • Dec 2019
    • 14029
    • Canada

    #2
    Re: 820-00580 stuck 20v 0.230a help!

    Can you revise the title bar to read '820-00850'?

    What is the voltage to ground of PPBUS_G3H ?
    Last edited by mon2; 08-10-2023, 03:05 PM.

    Comment

    • marcelofct
      Senior Member
      • May 2019
      • 122
      • chile

      #3
      Re: 820-00580 stuck 20v 0.230a help!

      Originally posted by mon2
      Can you revise the title bar to read '820-00850'?
      Done!

      What is the voltage to ground of PPBUS_G3H ?
      12.58v

      Comment

      • marcelofct
        Senior Member
        • May 2019
        • 122
        • chile

        #4
        Re: 820-00850 stuck 20v 0.230a help!

        anyone

        Comment

        • piernov
          Super Moderator
          • Jan 2016
          • 4435
          • France

          #5
          Re: 820-00850 stuck 20v 0.230a help!

          If the SSD IC is shorted the SSD IC is shorted… of course buck converter must be fixed before putting replacement SSD ICs.
          OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

          Comment

          • marcelofct
            Senior Member
            • May 2019
            • 122
            • chile

            #6
            Re: 820-00850 stuck 20v 0.230a help!

            Originally posted by piernov
            If the SSD IC is shorted the SSD IC is shorted… of course buck converter must be fixed before putting replacement SSD ICs.

            With that I am sure that nothing can be done

            gracias amigo ,

            Comment

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