Asus GL504GS

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  • Dana24
    Member
    • Jan 2022
    • 18
    • Netherlands

    #1

    Asus GL504GS

    Working on a Asus Gl504GS mainboard.

    the laptop has no sound anymore tried anything in windows but still no luck.
    the realtek driver is also not shown in windows and it doesnt even play in the BIOS sounds.(startup logo sound)

    i founded one shorted CAP near the Realtek ALC3288 IC removed but still no luck.

    what should i do next? just replace the IC ?
    i do measure 5V in near by the IC. and the short is gone.
  • Dana24
    Member
    • Jan 2022
    • 18
    • Netherlands

    #2
    Re: Asus GL504GS

    up anyone?

    Comment

    • mon2
      Badcaps Legend
      • Dec 2019
      • 14023
      • Canada

      #3
      Re: Asus GL504GS

      Is the (Iggy?) Azalia codec heating up ?

      What is the history of this unit? Any liquid damage near the audio section?

      What is the voltage to ground of AMP_SLEEP# ?

      Check each of the power rails that are shown in the schematic for this device.

      Each one is present and within the proper range?
      Attached Files

      Comment

      • Dana24
        Member
        • Jan 2022
        • 18
        • Netherlands

        #4
        Re: Asus GL504GS

        Originally posted by mon2
        Is the (Iggy?) Azalia codec heating up ?

        What is the history of this unit? Any liquid damage near the audio section?

        What is the voltage to ground of AMP_SLEEP# ?

        Check each of the power rails that are shown in the schematic for this device.

        Each one is present and within the proper range?

        thanks for the reply ! no liquid damage, the Azalia Codec is not heating up there was a Shorted CAP wich was heating up near the Codec i removed the cap and the short was gone. i havent placed a new one yet might that be it ?

        Comment

        • mon2
          Badcaps Legend
          • Dec 2019
          • 14023
          • Canada

          #5
          Re: Asus GL504GS

          The heat may have been only due to the shorted cap.

          Which cap was shorted?

          What is the voltage to ground of AMP_SLEEP# ?

          If this signal is a logic low = 0 volts, then the amp is being requested to enter sleep mode.

          Comment

          • Dana24
            Member
            • Jan 2022
            • 18
            • Netherlands

            #6
            Re: Asus GL504GS

            Originally posted by mon2
            The heat may have been only due to the shorted cap.

            Which cap was shorted?

            What is the voltage to ground of AMP_SLEEP# ?

            If this signal is a logic low = 0 volts, then the amp is being requested to enter sleep mode.
            I will measure the voltage once again and look up the cap i removed it.
            saddly im not at the office till tonight so i will updated it later on the day. thanks in advance

            Comment

            • Dana24
              Member
              • Jan 2022
              • 18
              • Netherlands

              #7
              Re: Asus GL504GS

              on the amp sleep i see 0 volt.

              Comment

              • Dana24
                Member
                • Jan 2022
                • 18
                • Netherlands

                #8
                Re: Asus GL504GS

                i replaced the cap but still no luck, i cant find the CAP on the manual and dont have boardview for this mainboard.

                Comment

                • Dana24
                  Member
                  • Jan 2022
                  • 18
                  • Netherlands

                  #9
                  Re: Asus GL504GS

                  Up

                  Comment

                  • mon2
                    Badcaps Legend
                    • Dec 2019
                    • 14023
                    • Canada

                    #10
                    Re: Asus GL504GS

                    amp sleep i see 0 volt
                    This is an active low signal since the net name has a '#' suffix.

                    So with a 0 volt = low digital signal, the amp is being requested to turn OFF.

                    Remove all power, meter in resistance mode, check the resistance to ground of this enable signal.

                    What is the resistance reading ? If the resistance is not a low value, then the driver of this signal is controlling this amplifier status.

                    Check your BIOS settings. Any option for audio enable / disable ?

                    If the audio codec is not being detected, check the power rails for this device. Check the series ferrite beads that are used to filter the power rails that may be damaged due to an excessive current draw so now, the audio codec is not being powered so cannot be enumerated. If the codec was toasty hot, likely it is damaged and will need to be replaced.

                    Check the voltage to ground measurements on Q3003A

                    PS: What is the version of your board? Is it 2.0 or 2.1 ?
                    Attached Files
                    Last edited by mon2; 05-04-2023, 05:47 AM.

                    Comment

                    • Dana24
                      Member
                      • Jan 2022
                      • 18
                      • Netherlands

                      #11
                      Re: Asus GL504GS

                      Originally posted by mon2
                      This is an active low signal since the net name has a '#' suffix.

                      So with a 0 volt = low digital signal, the amp is being requested to turn OFF.

                      Remove all power, meter in resistance mode, check the resistance to ground of this enable signal.

                      What is the resistance reading ? If the resistance is not a low value, then the driver of this signal is controlling this amplifier status.

                      Check your BIOS settings. Any option for audio enable / disable ?

                      If the audio codec is not being detected, check the power rails for this device. Check the series ferrite beads that are used to filter the power rails that may be damaged due to an excessive current draw so now, the audio codec is not being powered so cannot be enumerated. If the codec was toasty hot, likely it is damaged and will need to be replaced.

                      Check the voltage to ground measurements on Q3003A

                      PS: What is the version of your board? Is it 2.0 or 2.1 ?
                      thanks in advance.

                      Í will check the power rails and voltages one more time and the resistance.
                      in bios is the audio enabled, i tried disabling it and re-enabling but no luck.

                      Comment

                      • Dana24
                        Member
                        • Jan 2022
                        • 18
                        • Netherlands

                        #12
                        Re: Asus GL504GS

                        Resistance of AMP-sleep : .972m

                        Q3003A : Pin 1 2.5V
                        Pin 2 : 0
                        pin 3 : 0
                        pin 4 : 2.5v
                        pin 5 : 5v
                        pin 6 : 0

                        Comment

                        • mon2
                          Badcaps Legend
                          • Dec 2019
                          • 14023
                          • Canada

                          #13
                          Re: Asus GL504GS

                          Confirm the pin #1 voltage. It should be the same reaching the codec for amp_sleep#. If you have a voltage here at pin #1 then it should be the same at the codec.

                          Comment

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