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HP Compaq CQ40 LA-4101P No Power Issue, Please Help

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    HP Compaq CQ40 LA-4101P No Power Issue, Please Help

    Hello, Please Help Me
    Today I got CQ40 notebook that if I pressed power button, only white power led turn on, the others like wifi, touchpad no light.
    After checked, I get this measurement :

    LID_SW (16) - 3.3V
    ACIN (127) - 1V (not stable, drop)
    VCC (9) - 3.3V
    ON / OFF # (32) - 3.1V / 3.3V
    EC_RST # (37 ) - 1.8V
    ACOFF (27) - 0V

    OFF / ON
    PM_SLP_S3 # (6) - 0V / 0V
    PM_SLP_S5 # (14) - 0V / 0V
    EC_RSMRST # (100) - 0V / 3.3V
    SYSON (95) - 0V / 0V
    VR_ON (121) - 0V / 0V
    SUSP # (116) - 0V / 0V

    This is the schematic :
    Attached Files

    #2
    Re: HP Compaq CQ40 LA-4101P No Power Issue, Please Help

    Anyone?

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      #3
      Re: HP Compaq CQ40 LA-4101P No Power Issue, Please Help

      PQ103 was brunt, changed it.
      Now it is not taking charge, if I plug in ac 1st and insert battery it charge but if I put battery and plugin ac it doesn't charge and PQ103 overheats.

      Please somebody help to solve it. Changed BQ24740 no effect.

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