DV9500 blue LED ring of death ?

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  • bianchi77
    Badcaps Legend
    • Jun 2016
    • 1121
    • Australia

    #1

    DV9500 blue LED ring of death ?

    Guys,

    Does anyone of you know on the solution for DV9500 blue LED ring of death ?
    I can see only blue LED on power connector, no response on button on switch LED and others LED...

    Thanks
  • Pragmatiko
    Badcaps Veteran
    • Jul 2013
    • 468
    • IT

    #2
    Re: DV9500 blue LED ring of death ?

    you should do a reflow of GPU

    Comment

    • bianchi77
      Badcaps Legend
      • Jun 2016
      • 1121
      • Australia

      #3
      Re: DV9500 blue LED ring of death ?

      flux and reflow the GPU and that will help? so it has a solder crack on its GPU ?

      Comment

      • bianchi77
        Badcaps Legend
        • Jun 2016
        • 1121
        • Australia

        #4
        Re: DV9500 blue LED ring of death ?

        I've reflown it and it's still not working, I suspect it's because of blowing diode near to the power supply input, I don't know what's the type, please have a look from the capture, thanks
        Attached Files

        Comment

        • bianchi77
          Badcaps Legend
          • Jun 2016
          • 1121
          • Australia

          #5
          Re: DV9500 blue LED ring of death ?

          What type of diode is it ?
          Attached Files

          Comment

          • bianchi77
            Badcaps Legend
            • Jun 2016
            • 1121
            • Australia

            #6
            Re: DV9500 blue LED ring of death ?

            JS > diode ?

            Comment

            • bianchi77
              Badcaps Legend
              • Jun 2016
              • 1121
              • Australia

              #7
              Re: DV9500 blue LED ring of death ?

              Can it be :
              http://www.s-manuals.com/smd/js
              https://cdn.badcaps-static.com/pdfs/...fc45fbb828.pdf

              Is it only the diode or could be something else ?

              Comment

              • BlueMidnight
                Badcaps Veteran
                • Jan 2015
                • 489
                • United States

                #8
                Re: DV9500 blue LED ring of death ?

                That information would be on the schematic. Which motherboard does it have? Take a picture of the labels. They are usually on/near the memory slots.

                Comment

                • bianchi77
                  Badcaps Legend
                  • Jun 2016
                  • 1121
                  • Australia

                  #9
                  Re: DV9500 blue LED ring of death ?

                  The label, please see at the attachement, thanks
                  Attached Files

                  Comment

                  • bianchi77
                    Badcaps Legend
                    • Jun 2016
                    • 1121
                    • Australia

                    #10
                    Re: DV9500 blue LED ring of death ?

                    could it be:


                    ??

                    Comment

                    • bianchi77
                      Badcaps Legend
                      • Jun 2016
                      • 1121
                      • Australia

                      #11
                      Re: DV9500 blue LED ring of death ?

                      This area I suspect
                      Attached Files

                      Comment

                      • BlueMidnight
                        Badcaps Veteran
                        • Jan 2015
                        • 489
                        • United States

                        #12
                        Re: DV9500 blue LED ring of death ?

                        Yes, that is the schematic. I know that is near the DC jack and the battery connector, so that might be the correct schematic page.

                        It doesn't look like it has a label next to the component on the board. But it's in a block labeled [D]. So that block of labels must be written nearby somewhere.

                        Comment

                        • BlueMidnight
                          Badcaps Veteran
                          • Jan 2015
                          • 489
                          • United States

                          #13
                          Re: DV9500 blue LED ring of death ?

                          After looking carefully at how the traces connect in your pictures, I think those diodes are probably PD15 and PD16. They are both CH501H schottky diodes.
                          Attached Files

                          Comment

                          • bianchi77
                            Badcaps Legend
                            • Jun 2016
                            • 1121
                            • Australia

                            #14
                            Re: DV9500 blue LED ring of death ?

                            I think you're right....it's connected to CN17 positive side...

                            Comment

                            • BlueMidnight
                              Badcaps Veteran
                              • Jan 2015
                              • 489
                              • United States

                              #15
                              Re: DV9500 blue LED ring of death ?

                              Oh and the datasheet says the marking is "JS" so that matches also.

                              Comment

                              • bianchi77
                                Badcaps Legend
                                • Jun 2016
                                • 1121
                                • Australia

                                #16
                                Re: DV9500 blue LED ring of death ?

                                I reckon, it can be replaced with 1N4007 ....

                                Comment

                                • BlueMidnight
                                  Badcaps Veteran
                                  • Jan 2015
                                  • 489
                                  • United States

                                  #17
                                  Re: DV9500 blue LED ring of death ?

                                  I wouldn't usually replace a schottky diode with a regular p-n diode. The regular diode has a higher voltage drop and a slower reverse recovery time. I don't think it's too important in that circuit though.

                                  Comment

                                  • bianchi77
                                    Badcaps Legend
                                    • Jun 2016
                                    • 1121
                                    • Australia

                                    #18
                                    Re: DV9500 blue LED ring of death ?

                                    do you reckon only PD16 is blown, or it's killing others...?
                                    Cheers

                                    Comment

                                    • bianchi77
                                      Badcaps Legend
                                      • Jun 2016
                                      • 1121
                                      • Australia

                                      #19
                                      Re: DV9500 blue LED ring of death ?

                                      I'll replace exactly with the type but I need to wait another month...

                                      Comment

                                      • bianchi77
                                        Badcaps Legend
                                        • Jun 2016
                                        • 1121
                                        • Australia

                                        #20
                                        Re: DV9500 blue LED ring of death ?

                                        How about 1N4148?

                                        Comment

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