GETAC S410 G1 brightness problem

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  • sarto
    Amateur
    • Aug 2019
    • 14
    • France

    #1

    GETAC S410 G1 brightness problem

    Hi everybody. I have a Getac S410 G1 with a screen brightness witch cannot be adjusted. It is at full brightness when the charger is plugged in (19V on the LCD connector) and at minimum under battery (12V on the LCD connector). Does anyone know where the problem is coming from ? Thank you.
  • sarto
    Amateur
    • Aug 2019
    • 14
    • France

    #2
    Problem solved.

    Comment

    • mon2
      Badcaps Legend
      • Dec 2019
      • 13835
      • Canada

      #3
      Nice to hear. What was the resolution?

      Had similar fun with this chassis last year in replacing their rare USB connectors. Ended up sourcing Molex USB mid-mount connectors (after hours of searching) and trimmed their mounts down to make it fit.

      Comment

      • noipi
        Senior Member
        • Aug 2017
        • 69
        • Singapore

        #4
        I had the same problem on my Getac, it's caused by a faulty magnetic sensor which causes the laptop to think it is always closed.
        In this state, the screen brightness goes down to minimum and the CPU frequency is locked at 0.4GHz. Luckily it is possible to disable the magnetic sensor in the BIOS on those laptops so you can use it normally.
        The only downside is that the laptop won't go to sleep automatically anymore after closing the lid.

        Comment

        • sarto
          Amateur
          • Aug 2019
          • 14
          • France

          #5
          Thank you for the 2 answers. I've found another the motherboard... Regards.

          Comment

          • sarto
            Amateur
            • Aug 2019
            • 14
            • France

            #6
            I've found 2 other Getac S410 with the same pb. So I will try to do something, if I can.

            The magnetic sensor is on the on/off P1 P2 button board (photo 1).
            The magnetic sensor (photo 2).
            The motherboard connection (photo 3).
            On the motherboard (photo4).

            Comment

            • sarto
              Amateur
              • Aug 2019
              • 14
              • France

              #7
              3 motherboards tested.
              With the adapter or with the battery only, voltages are the same on the P1/P2/ON board. So the problem does not come from there.

              Two other things to check (before to inspect the motherboard, I checked the manual) :

              1 * P2 button : "Toggles the sunlight-readable mode on or off. In sunlight-readable mode, the LCD brightness is increased to the highest level."
              Where is the light sensor ? On the webcam board (even if there is no webcam) ?​

              2 * The display brightness cannot be increased.
              "As a protection, the display brightness will be fixed at a low level when the surrounding temperature is too high or too low. It is not a malfunction in this situation."

              Comment

              • sarto
                Amateur
                • Aug 2019
                • 14
                • France

                #8
                The problem does not come from P2 button or temperature (does not change when the laptop works on battery).
                CPU voltage changes (0,9V / 0,6V on batt). CPU multiplier frequency changes (27x to 3x).

                Comment

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