lenovo B590 power on problem

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  • sourcebf
    Badcaps Veteran
    • Jul 2016
    • 431
    • N/A
    #1

    lenovo B590 power on problem

    Hi everybody,

    I have a lenovo B590 board :
    LB59A MB
    12209-1
    48.4XB01.001
    It doesn't start by pressing on power sw although 3.3v is present on power sw.
    I shunted it with GND without result.

    The motherboard starts only if I remove the CMOS battrie and I plug the power charger.

    help me please.....
    Attached Files
    Tags: None
    • sourcebf
      Badcaps Veteran
      • Jul 2016
      • 431
      • N/A
      #2
      Re: lenovo B590 power on problem

      update....see picture attached
      Attached Files

        Comment

        • sourcebf
          Badcaps Veteran
          • Jul 2016
          • 431
          • N/A
          #3
          Re: lenovo B590 power on problem

            Comment

            • byulo
              ECT
              • Jun 2012
              • 87
              • Philippines
              #4
              Re: lenovo B590 power on problem

              If the charging indicator won't light also try to reflash your BIOS. It's a common issue on Lenovo laptop

                Comment

                • byulo
                  ECT
                  • Jun 2012
                  • 87
                  • Philippines
                  #5
                  Re: lenovo B590 power on problem

                  Try this bios dump.
                  Attached Files

                    Comment

                    • sourcebf
                      Badcaps Veteran
                      • Jul 2016
                      • 431
                      • N/A
                      #6
                      Re: lenovo B590 power on problem

                      Originally posted by byulo
                      Try this bios dump.
                      thanks a lot, i'll try and reply....

                        Comment

                        • sourcebf
                          Badcaps Veteran
                          • Jul 2016
                          • 431
                          • N/A
                          #7
                          Re: lenovo B590 power on problem

                          the same problem with your bump....

                            Comment

                            • fester
                              Senior Member
                              • May 2017
                              • 158
                              • Slovakia
                              #8
                              Re: lenovo B590 power on problem

                              meassure double diode Q6001 if is ok.

                                Comment

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