short to ground CPU Vcore rail Acer vn7-591g

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  • casti3l
    Senior Member
    • Mar 2014
    • 95
    • romania
    #1

    short to ground CPU Vcore rail Acer vn7-591g

    Hello i need some help - acer vn7-591g i7-4710hq/ gtx960

    First the short was start from the second mosfet at DC-in, then i manage to isolate the short on small part of the MB, i will atach a pictures with the short, any suggestion how to identife where is it without desoldering all cap's.

    NOTE: Now the laptop starts if i cut the power to cpu.
    Attached Files
    Last edited by casti3l; 08-14-2018, 03:35 AM.
    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4435
      • France
      #2
      Re: short to ground CPU Vcore rail Acer vn7-591g

      Measure resistance between DCBATOUT and 1V_CPU_CORE.
      Measure resistance between 1V_CPU_CORE and ground.
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • casti3l
          Senior Member
          • Mar 2014
          • 95
          • romania
          #3
          Re: short to ground CPU Vcore rail Acer vn7-591g

          between 14k
          1V_CPU_CORE and ground = 0

            Comment

            • piernov
              Super Moderator
              • Jan 2016
              • 4435
              • France
              #4
              Re: short to ground CPU Vcore rail Acer vn7-591g

              If it's 0 and not 10 to 70 ohms (or so) then indeed something is shorted. You can inject 1V and check what heats up (do not go above 1.8V to not damage the CPU). Maybe PU4702/PU4703 or a capacitor.
              OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                Comment

                • tomodachi
                  Badcaps Veteran
                  • Apr 2012
                  • 593
                  • Turkey
                  #5
                  Re: short to ground CPU Vcore rail Acer vn7-591g

                  Safe to say your CPU is gone

                    Comment

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