Dell XPS M1330 Intel platform- NO EN signal for 3/5V ALW what is wrong?

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  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3577
    • slovakia
    #1

    Dell XPS M1330 Intel platform- NO EN signal for 3/5V ALW what is wrong?

    Hello have this dell XPS M1330 that have no EN signal for 3/5V ALW TPS51120 IC. What signals/voltages must have to SIO release this signal?

    flashed bios but nothing changed

    i have 3.3LDO from TPS51120 and 3.3V from battery and rtc
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    • khaahk
      Badcaps Veteran
      • Dec 2013
      • 759
      • Estonia
      #2
      Re: Dell XPS M1330 Intel platform- NO EN signal for 3/5V ALW what is wrong?

      Maybe after power button is pressed? Do you have 15V alw?

        Comment

        • ktmmotocross
          Boardkiller
          • Feb 2014
          • 3577
          • slovakia
          #3
          Re: Dell XPS M1330 Intel platform- NO EN signal for 3/5V ALW what is wrong?

          when have no 3.3Valw, no pover for power button

            Comment

            • khaahk
              Badcaps Veteran
              • Dec 2013
              • 759
              • Estonia
              #4
              Re: Dell XPS M1330 Intel platform- NO EN signal for 3/5V ALW what is wrong?

              The power button seems to be pulled high by rtc_cell, this should be present.
              Check the +15V_ALWP, it might need to be present to turn on other rails. Does Q68 get 32kHz signal to gate from SIO? It might be generating the pulses to make 15V...

              Just guessing here...

                Comment

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