Hp dv5 504640-001

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  • marcellodj
    Senior Member
    • Nov 2010
    • 99
    #1

    Hp dv5 504640-001

    The unit was killed by customer inverting polarity with an external oem supply; now no power led and no signs of life.

    I found 19v,3v and 5v in several zones, and 3v on pwr btn, but would know a good point to start for.

    Thanks
    Tags: None
    • Nocta
      Senior Member
      • Mar 2012
      • 117
      • Argentina
      #2
      Re: Hp dv5 504640-001

      Could you please upload pictures of the motherboard? From both sides.

      Please, attach them don't post them inline.

        Comment

        • b700029
          Banned
          • Sep 2010
          • 640
          #3
          Re: Hp dv5 504640-001

          Start looking in the 5VSB/3.3VSB circuits.

          Is it a Quanta QT8 or other motherboard model? You can try finding the schematic if you know this.

            Comment

            • marcellodj
              Senior Member
              • Nov 2010
              • 99
              #4
              Re: Hp dv5 504640-001

              Hello, is QUANTA QT6, schematic found ,where to start for?

                Comment

                • b700029
                  Banned
                  • Sep 2010
                  • 640
                  #5
                  Re: Hp dv5 504640-001

                  Look for the standby voltages first.

                    Comment

                    • marcellodj
                      Senior Member
                      • Nov 2010
                      • 99
                      #6
                      Re: Hp dv5 504640-001

                      While looking voltages (all seems good), found ENE KB3926 getting very hot, will try to replace and keep forum updated.btw happy easter to all.--m

                        Comment

                        • b700029
                          Banned
                          • Sep 2010
                          • 640
                          #7
                          Re: Hp dv5 504640-001

                          That's the embedded controller. If you replace it you will need to reflash the firmware.

                            Comment

                            • marcellodj
                              Senior Member
                              • Nov 2010
                              • 99
                              #8
                              Re: Hp dv5 504640-001

                              Reflashing is needed also if i use the same part?

                                Comment

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