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    lenovo w520 dead

    found the board view of this laptop
    but there is something i cannot understand....
    the problem was that the owner used a 32v adapter instead of 20v, keeping the right polarity
    no burn or smell, just no leds no charge, even cannot power on full battery
    i am confused and do not know where to begin testing,
    at the begining there is q28, the source is 19.6 v but no volt on drain
    Attached Files
    Last edited by mazloum; 03-16-2020, 11:26 AM.

    #2
    Re: lenovo w520 dead

    Measure exact resistance to ground on Q29 drain/source/gate.
    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

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      #3
      Re: lenovo w520 dead

      Originally posted by piernov View Post
      Measure exact resistance to ground on Q29 drain/source/gate.
      drain to ground = 3.543 Mohm
      source to ground = 4.2 ohm
      gate to ground= 196 K ohm

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        #4
        Re: lenovo w520 dead

        Any one

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          #5
          Re: lenovo w520 dead

          Hi
          Q29 Source to gnd 4.2Ohm is to low
          Check Q28 C756 D38 Q30

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