Hp CQ71-405SF Internal display very Dark

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  • passete
    Living=Sharing
    • Jun 2015
    • 487
    • France
    #1

    Hp CQ71-405SF Internal display very Dark

    I have here a CQ71 mobo with a weird symptom :
    the internal lcd (LED) is very dark at point that I can't use it.
    I have made a "soft" reflow on gpu and no change, with LED display, there are not external inverters like before ?
    I read that he could be just a setting using the original keyboard, but I don't have any keyboard compatible with this mobo.
    same lcd display work's fine on another CQ71 mobo.

    Any hints ?
    Thanks
    Tags: None
    • passete
      Living=Sharing
      • Jun 2015
      • 487
      • France
      #2
      Re: Hp CQ71-405SF Internal display very Dark

      Anyone Please ?

        Comment

        • looofy
          Member
          • Jul 2015
          • 34
          • sudan
          #3
          Re: Hp CQ71-405SF Internal display very Dark

          do you mean by (very dark) there is a few light ? or there is no light

            Comment

            • looofy
              Member
              • Jul 2015
              • 34
              • sudan
              #4
              Re: Hp CQ71-405SF Internal display very Dark

              check the voltage in cn1 VADJ1 ,BLON_CON and +VIN_BLIGHT
              Attached Files
              Last edited by looofy; 07-24-2015, 03:44 PM.

                Comment

                • wibble
                  Member
                  • Jan 2011
                  • 31
                  #5
                  Re: Hp CQ71-405SF Internal display very Dark

                  Sometimes there is a fuse near the LCD connector which can go open.

                    Comment

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