Lenovo T470s keyboard backlight not working.

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  • Andreasbest
    Badcaps Legend
    • Aug 2014
    • 1151
    • Hellas ( Greece )
    #1

    Lenovo T470s keyboard backlight not working.

    Hello.
    I received a T470s today with no backlit on keyboard, tried multiple working keyboards but none lit up.
    Tried bios reset, bios update, several key combination but nothing so i assume the keyboard backlit fuse is blown, problem is i don't know which one is.
    Can you help me?

    Thank you in advance!
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    • tomodachi
      Badcaps Veteran
      • Apr 2012
      • 600
      • Turkey
      #2
      Re: Lenovo T470s keyboard backlight not working.

      Check F13 and F23, must be near trackpoint connector ( J37 )

        Comment

        • Andreasbest
          Badcaps Legend
          • Aug 2014
          • 1151
          • Hellas ( Greece )
          #3
          Re: Lenovo T470s keyboard backlight not working.

          F13 and F23 are good

            Comment

            • rediii
              h???, spurrrn
              • Mar 2018
              • 487
              • somewhere in europe
              #4
              Re: Lenovo T470s keyboard backlight not working.

              did you check for short on the rails, what voltages do you have there (pin10/11)? check the resistors on that lines (p. 58)

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