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    Motherboard asus x556uj maybe dead

    Hi im Monster.
    I have an X556UJ motherboard, which doesn't turn on but the power led stays on all the time as soon as I connect the charger.

    I have the boardview, I have analyzed all the voltages of the it8995e, all are correct (i mean, the most important for wake up the pc) except the RsmRst 0v and the PWRBTN 2.4v.

    I have injected 3.3v into the rsmrst and the led turned off momentarily but nothing else.
    Also check other threads where they say to inject 3v to +3VADSWO to see if the pch gets hot but that line already has 3v.
    Bios voltage pin 1 = 3,2v | 2 = 3,2v | 3 = 3,2v | 4=0v | 5 = 0v| 6= 0v | 7 =3,2v | 8 = 3,2v

    On the photo can see that power light is always on, i dont knw why. Maybe Ec damaged? or pch?

    what else can i check? Also i want to know where the RSMRST is from.

    Sry if i dont know so much im learing
    Attached Files
    Last edited by Themonster; 02-23-2023, 08:20 PM.
  • Answer selected by Themonster at 01-20-2024, 11:47 AM.

    Re: Motherboard asus x556uj maybe dead

    See here, flash your bios...

    https://www.badcaps.net/forum/showthread.php?t=80633

    Comment


      #2
      Re: Motherboard asus x556uj maybe dead

      RSMRST# is generated by SIO and its a wake up call for PCH. When RSMRST# is released by EC and goes to PCH, then PCH in turn will release SLP_SX signal. What is the resistance on RSMRST#? It must be atleast 10K or higher. PM_BATLOW# status??

      Comment


        #3
        Re: Motherboard asus x556uj maybe dead

        Resisitence 10k aprox some times 9.9k and others 10k so its working properly.
        The BATLOW is high 3.2v aprox, so is active i guess.

        Comment


          #4
          Re: Motherboard asus x556uj maybe dead

          See here, flash your bios...

          https://www.badcaps.net/forum/showthread.php?t=80633

          Comment


            #5
            Re: Motherboard asus x556uj maybe dead

            Originally posted by Themonster View Post
            Resisitence 10k aprox some times 9.9k and others 10k so its working properly.
            The BATLOW is high 3.2v aprox, so is active i guess.
            Yes, nothing wrong here.

            Comment


              #6
              Re: Motherboard asus x556uj maybe dead

              Today i recived my CH341A, but my bios chip mx25L6473E isnt detected, detect mx26L6405D, how i can download the correct or change it?

              Comment


                #7
                Re: Motherboard asus x556uj maybe dead

                bios chip was empty, i searched how read and erase.

                Comment


                  #8
                  Re: Motherboard asus x556uj maybe dead

                  it was the bios thx for help me im happy

                  Comment


                    #9
                    Re: Motherboard asus x556uj maybe dead

                    Originally posted by Themonster View Post
                    it was the bios thx for help me im happy
                    Hi you beter use neoprogrammer or colibri
                    Attached Files

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