Sony Vaio Black Screen

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  • Jesse James
    Senior Member
    • Sep 2018
    • 95
    • Canada
    #1

    Sony Vaio Black Screen

    Hey guys. I have a Sony PCG-71713L that I am trying to figure out if possible. It has no output to screen but posts on external vga. I have tested powers to screen and found on pins 5,6,7 no 3.3v and trying to figure out. I have checked all fuses on board I can find and traced screen cable pins. I do have 19v to screen but need to trace source of 3.3.
    Any suggestions

    V061 Main Board LL
    1P-0114200-6013
    Rev: 1.3
    MBX-241
    Last edited by Jesse James; 03-10-2019, 07:15 AM.
    Tags: None
    • SMDFlea
      Super Moderator
      • Jan 2018
      • 20708
      • UK
      #2
      Re: Sony Vaio Black Screen

      https://www.badcaps.net/forum/showthread.php?t=32544

      Check the F15 fuse and Q177
      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

        Comment

        • Jesse James
          Senior Member
          • Sep 2018
          • 95
          • Canada
          #3
          Re: Sony Vaio Black Screen

          Thanks SMDFlea but that area seems to been 19v rail and is good.
          I have no 3.3v on pins 5,6, and no backlight only a quick flash on startup other than that no life to screen. I have checked every fuse I could find and seems ok. I need to backtrack somehow to find source of my 3.3v

            Comment

            • SMDFlea
              Super Moderator
              • Jan 2018
              • 20708
              • UK
              #4
              Re: Sony Vaio Black Screen

              Test voltage on each side of the fuse after power on, ive had a few fuses troll me. You do get a brief flash, maybe youve got a corrupt EDID .
              All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                Comment

                • Duranitron
                  Badcaps Veteran
                  • Jul 2014
                  • 544
                  • Philippines
                  #5
                  Re: Sony Vaio Black Screen

                  just a suggestion.. if you have a spare lcd screen try it .may be you have a defective lcd screen. or try your lcd screen to other unit or if you have an lcd screen tested use it first before digging to something complicated...
                  Never stop LEARNING because life never stops TEACHING!

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