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Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

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    Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

    Hi guys, on this excited day I want to troubleshoot this asus x450cc rev2.3 motherboard, 3v and 5v voltages are missing after getting 24v voltage on the charger, I hope all colleagues can help me on this problem, these are measurement results from PU8100(UP1589Q):

    FB1= 0V PIN1
    ENTRIP1 = 5.54V PIN2
    TON=1.96V PIN3
    ENTRIP2=2.83V PIN4
    FB2=0V PIN5
    PGOOD=0V PIN6
    BOOT2=5.41V PIN7
    UGATE2=0V PIN8
    PHASE2=0V PIN9
    LGATE2=6.05V PIN10
    VIN=19.17V PIN11
    ENLDO=5.94V PIN12
    SECFB=0.23V PIN13
    LDO5=6.06V PIN14
    LDO3=4.00V PIN15
    LGATE1=0V PIN16
    PHASE1=0V PIN17
    UGATE1=0V PIN18
    BOOT1=5.40V PIN19
    BYP1=0V PIN20

    This measurement condition is the moment before the power button is pressed, I hope all colleagues can help me with this problem, I thank you.

    #2
    Re: Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

    Start by taking voltage at charger section : D/G/S voltage for the first 2 mosfets .
    If you have BRD post it

    Comment


      #3
      Re: Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

      Originally posted by lapfix View Post
      Start by taking voltage at charger section : D/G/S voltage for the first 2 mosfets .
      If you have BRD post it
      Hi, thank you for taking the time to help me
      PQ8801
      S=19V
      D=19V
      G=24.02V

      PQ8807
      S=19V
      D=19V
      G=24.03V

      PR8806 19V On both sides

      I also attach the boarview here
      Attached Files

      Comment


        #4
        Re: Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

        What's the password for BRD !

        LDO5=6.06V PIN14 !
        LDO3=4.00V PIN15 !

        Comment


          #5
          Re: Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

          Originally posted by lapfix View Post
          What's the password for BRD !
          Password = herd

          Sory iam forget to post the password

          Comment


            #6
            Re: Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

            Something is wrong with this 2 pins : 14/15
            measure again

            Comment


              #7
              Re: Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

              Originally posted by lapfix View Post
              Something is wrong with this 2 pins : 14/15
              measure again
              okay, after I measure again at pin 14=6.12v , pin 15=3.98

              And I feel that the ic is warm when the adapter is connected.

              Comment


                #8
                Re: Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

                replace ic, but first take resistance measurement on 3/5V rails

                Comment


                  #9
                  Re: Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

                  Your linear regulator is faulty , when you get VIN=19.17V PIN11 and ENLDO=5.94V PIN12
                  3/5 vl must be present , it's not your situation, so change this IC .

                  up1589q = RT8239B/C

                  Comment


                    #10
                    Re: Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

                    Originally posted by ktmmotocross View Post
                    replace ic, but first take resistance measurement on 3/5V rails
                    measurement using buzzer mode

                    5v rail=591
                    3v rail=431

                    I also hear a small sound like (ngiiiing) on the ic when voltage is applied

                    Comment


                      #11
                      Re: Asus x450cc rev 2.3 no power after receiving 24v from broken adaptor

                      Originally posted by lapfix View Post
                      Your linear regulator is faulty , when you get VIN=19.17V PIN11 and ENLDO=5.94V PIN12
                      3/5 vl must be present , it's not your situation, so change this IC .

                      up1589q = RT8239B/C
                      okay I thank you all for being willing to give me knowledge today, I will order for a new ic and after that I will update again, thanks to all of you

                      Comment

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