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hp 850 g6 not powering on

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    hp 850 g6 not powering on

    Hi all,

    MOBO model: 6050a3022501-mb-a01

    after measuring the coils on board, i have found 12v,5v,3.3v
    also have 3.35v on power button and orange light near dc in conn.

    how can i continue inspect that ?

    #2
    Re: hp 850 g6 not powering on

    Check the basic requirement of SIO to begin with. Look for corrosion. Flash bios. These are the preliminary actions suggested.

    Comment


      #3
      Re: hp 850 g6 not powering on

      Thank you for your answer,

      I think the history of the laptop is liquid spill on key board but i found no corrosion on MOBO, also when connecting it to power adapter i see a slight/tiny heat point on the chip on the attached pic

      is there a guide on how to Check the basic requirement of SIO ?

      about bios i don't have the flash tool.
      Attached Files

      Comment


        #4
        Re: hp 850 g6 not powering on

        I have another working laptop same model, if i take the bios chip and install on this one, it will be possible to understand if the issue is from bios ?

        Comment


          #5
          Re: hp 850 g6 not powering on

          No. U need to make a backup from the working board and then clean me region of that backup and flash on the board you are working.Your SIO is BGA chip-so almost impossible to check.

          Comment


            #6
            Re: hp 850 g6 not powering on

            A question please,

            in order to back up the working one, do i must unsolder and read via programmer or its possible from within OS?

            Also is the chip in the attached photo is the BIOS ?
            Attached Files

            Comment


              #7
              Re: hp 850 g6 not powering on

              Unsolder from laptop mb and read with Spi programmer. Its a 32MB Chip.

              Comment


                #8
                Re: hp 850 g6 not powering on

                OK, finally i succeeded to read the bios and i have a file.

                Comment


                  #9
                  Re: hp 850 g6 not powering on

                  Hi,

                  I have flashed bios i have got from the good folks here

                  https://www.badcaps.net/forum/showth...05#post1137805

                  But Laptop still does not power on, i can see its charging the battery but not powering on.

                  any other suggestion? any idea? any direction?

                  I will be happy to hear!

                  Thanks

                  Comment


                    #10
                    Re: hp 850 g6 not powering on

                    Originally posted by koby058 View Post
                    Thank you for your answer,

                    I think the history of the laptop is liquid spill on key board but i found no corrosion on MOBO, also when connecting it to power adapter i see a slight/tiny heat point on the chip on the attached pic

                    is there a guide on how to Check the basic requirement of SIO ?

                    about bios i don't have the flash tool.
                    Perhaps SIO is bad as you mentioned its heating a bit. What is the resistance on 3V LDO??

                    Comment


                      #11
                      Re: hp 850 g6 not powering on

                      Can you please suggest me where to measure ?

                      Comment


                        #12
                        Re: hp 850 g6 not powering on

                        Schematic for this mb is not in my desk. Which 3V regulator is there on this board?? You can download the datasheet of this ic to findout 3V LDO pin.

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