Lenovo Z500 LA-9063P noBacklight - No PWM voltage

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  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3561
    • slovakia
    #1

    Lenovo Z500 LA-9063P noBacklight - No PWM voltage

    Hello.
    Have this Lenovo Z500 LA-9063P that have no Backlight. All voltages is ok but no PWM voltage. R431 have no voltage on botha sides. looks like PWM come right from EC. This means that EC is burned?
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    • ktmmotocross
      Boardkiller
      • Feb 2014
      • 3561
      • slovakia
      #2
      Re: Lenovo Z500 LA-9063P noBacklight - No PWM voltage

      what a damn solution. enter bios and push button for add baklight and all work

        Comment

        • ktmmotocross
          Boardkiller
          • Feb 2014
          • 3561
          • slovakia
          #3
          Re: Lenovo Z500 LA-9063P noBacklight - No PWM voltage

          system offcourse need that mighty registry change to have working backlight buttons on Z500

            Comment

            • salmec
              New Member
              • Jan 2025
              • 2
              • Italia
              #4
              Originally posted by ktmmotocross
              Re: Lenovo Z500 LA-9063P noBacklight - No PWM voltage

              what a damn solution. enter bios and push button for add baklight and all work
              I have the same issue but entering the BIOS I cannot find any button to add back light..
              Suddenly my Backlight power off and now I'm using an external display, sometimes on external monitor I can see some flickering or illumination changes...

              By original keybard pressing F11 or F12 UI can see the illumination bar active, but nothing is changing. Max illumination = Zero illumination.

              Thanks in advance

              Salmec

                Comment

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