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please help toshiba c850 no display just work on external

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    please help toshiba c850 no display just work on external

    toshiba c850
    plf/plr/csf/csr DCS mb rev :2.1


    no display but it work in crt conn
    when i connected to lcd monitor (crt external ) work good and data and boot win

    but there is no data on it's monitor (internal)
    i changed screen but no new
    i changed i/o but no new
    reprogram bios but no new
    two pictures attachments for LVDS connector voltage measurement

    thanks
    Attached Files

    #2
    Re: please help toshiba c850 no display just work on external

    Have you checked hall sensor? Maybe it thinks lid is closed?

    Comment


      #3
      Re: please help toshiba c850 no display just work on external

      Originally posted by BalkanBoy View Post
      Have you checked hall sensor? Maybe it thinks lid is closed?
      i checked it and change it too no new

      Comment


        #4
        Re: please help toshiba c850 no display just work on external

        Watch this:

        https://youtu.be/5Tv2HnU6Ouo

        Comment


          #5
          Re: please help toshiba c850 no display just work on external

          Originally posted by mon2 View Post
          thanks
          do you mean vga chip is problem
          and the problem solved by dis to uma conversion ?

          Comment


            #6
            Re: please help toshiba c850 no display just work on external

            The dude in the video is using hot air to temp fix the the video controller. If your unit has one then he is claiming that 99% of the time it is the fault.

            Perhaps consider to test in the same way with the heat gun to see if your LCD comes to life or not.

            BTW: Do unplug the adapter (which he did not do) in this video while he was working with the logic board.

            Comment


              #7
              Re: please help toshiba c850 no display just work on external

              Originally posted by mon2 View Post
              The dude in the video is using hot air to temp fix the the video controller. If your unit has one then he is claiming that 99% of the time it is the fault.

              Perhaps consider to test in the same way with the heat gun to see if your LCD comes to life or not.

              BTW: Do unplug the adapter (which he did not do) in this video while he was working with the logic board.
              thanks for you @mon2
              i converted it from dis to uma and work well
              thanks again pro

              Comment

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