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Lenovo Ideapad 320 Stuck at 330mA

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    Lenovo Ideapad 320 Stuck at 330mA

    Lenovo Ideapad NM-B241 turns ON but no Display. Taking 330mA, No voltage coil PL1001 +VCC_GT.

    #2
    Re: Lenovo Ideapad 320 Stuck at 330mA

    hi.

    1) remove all power.

    2) Meter in resistance mode.

    Measure and post the:

    a) resistance between source (1-2-3) & drain (5) of PQ1001.

    b) resistance between source (1-2-3) & gate (4) of PQ1001.

    c) resistance between drain (5) & gate (4) of PQ1001.

    d) resistance between source (1-2-3) & drain (5) of PQ1002.

    e) resistance between source (1-2-3) & gate (4) of PQ1002.

    f) resistance between drain (5) & gate (4) of PQ1002.

    Comment


      #3
      Re: Lenovo Ideapad 320 Stuck at 330mA

      a) PQ1001- S vs D - 8 Mohms
      b) PQ1001- S vs G - 13 Mohms
      c) PQ1001- D vs G - 1.0 ohms
      d) PQ1002- S vs D - 4.5 ohms
      e) PQ1002- S vs G - 4.5 ohms
      f) PQ1002- D vs G - 0.0 ohms

      Comment


        #4
        Re: Lenovo Ideapad 320 Stuck at 330mA

        Another important thing is I am getting 0.845V on coil PL1001. Actually voltage is miising on PL1003. I made mistake while typing the title.

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          #5
          Re: Lenovo Ideapad 320 Stuck at 330mA

          a) PQ1005- S vs D - 8 Mohms
          b) PQ1005- S vs G - 8 Mohms
          c) PQ1005- D vs G - 1.0 ohms
          d) PQ1006- S vs D - 2.2 ohms
          e) PQ1006- S vs G - 13.7 ohms
          f) PQ1006- D vs G - 13.7 Kohms

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            #6
            Re: Lenovo Ideapad 320 Stuck at 330mA

            Desolder PQ1006 and measure & post the resistance values again on this removed mosfet. Some of these readings look very low on the mosfets.

            Perhaps a dead CPU ?

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              #7
              Re: Lenovo Ideapad 320 Stuck at 330mA

              No idea. Any way planning to change those PQ1001, PQ1002, PQ1005, PQ1006 and PU1402

              Comment


                #8
                Re: Lenovo Ideapad 320 Stuck at 330mA

                UPDATE!
                I did once more check up before ordering the components. I found PL1003 has a momentarily output of around 0.680v some times while observing with DSO. So I did checking all the resistors around the PU1402. All were correct. Then just by an intuition flashed bios from https://www.badcaps.net/forum/showthread.php?t=72785 this thread, and all went right. Now it does have display.

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