GL502VMK keyboard not working after liquid spill

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  • questore
    Badcaps Veteran
    • Dec 2015
    • 485
    • csongrád

    #21
    Originally posted by questore
    If nobody has an idea why EC is not responding when try to program it, i order a new EC chip
    I have managed to read the EC and its firmware is good.
    I cannot see where is the communication lines between the two IT chips, can someone point me to the right direction, maybe its just a bad resistor.

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    • questore
      Badcaps Veteran
      • Dec 2015
      • 485
      • csongrád

      #22
      I have noticed that even when the laptop is turned off the PCH is getting warm (33 Celsius) and Board Power draw is 80 MilliAmps that is s lot for a laptop that is in OFF state.
      Any idea what should i check on PCH lines that could take such power?

      Comment

      • khaahk
        Badcaps Veteran
        • Dec 2013
        • 755
        • Estonia

        #23
        Communication between the to ITE is via smbdat/clk0.
        I understand that you programmed the 8171 with 56k dump, all that went fine? Read back also fine?

        Originally posted by questore

        I have managed to read the EC and its firmware is good.
        I cannot see where is the communication lines between the two IT chips, can someone point me to the right direction, maybe its just a bad resistor.
        Attached Files

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        • questore
          Badcaps Veteran
          • Dec 2015
          • 485
          • csongrád

          #24
          Originally posted by khaahk
          Communication between the to ITE is via smbdat/clk0.
          I understand that you programmed the 8171 with 56k dump, all that went fine? Read back also fine?


          I have read it and it was exactly the same as the 128k I wanted to write so no need.
          As for the 56k keyboard controller... I have tryed 6 different firmware and none of them worked.
          One of the firmwares is a universal gl50x that allready used on different modells before with success.

          Comment

          • khaahk
            Badcaps Veteran
            • Dec 2013
            • 755
            • Estonia

            #25
            Check the smb clk and data lines for communication when keys pressed, inspect visually. Liquid damage is not always easy to find.

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            • questore
              Badcaps Veteran
              • Dec 2015
              • 485
              • csongrád

              #26
              Never mind. I wanted to check if windows sees the keyboard contoller at all so i have started to install win 10.
              Durring the installation Laptop suddenly smelled funny and turned off.
              1VSUS now shorted to ground and PCH taking 600 MilliAmps. At least I was right that PCH is taking to much power even in off state.
              Lets see what happens after PCH replacement.

              Comment

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