Gateway NV59C09U No backlight LED

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  • Reech
    Member
    • Sep 2012
    • 21
    • United States

    #1

    Gateway NV59C09U No backlight LED

    Motherboard: NEW90 L21
    I can faintly see image on the display with flashlight but screen has no brightness at all. Laptop was dropped; replaced the power jack and LED display cable. Both were damaged and the left hinge was snapped off and flopping around. The LED cable must have shorted something since the display was working prior to the repairs.
    The 2 fuses on back of the LED display check good.
    I could not locate any other fuses on the motherboard.
  • selldoor
    Slow Learner
    • Dec 2010
    • 7870

    #2
    Re: Gateway NV59C09U No backlight LED

    You are going to have to post good clear photos of both sides of the boards.
    Dropping - if it was on at the time could have displaced graphics chip?

    Have you tried it with an external display?
    Please upload pictures using attachment function when ask for help on the repair
    http://www.badcaps.net/forum/showthread.php?t=39740

    Comment

    • Reech
      Member
      • Sep 2012
      • 21
      • United States

      #3
      Re: Gateway NV59C09U No backlight LED

      Wore ground strap for all motherboard touching.
      Battery was removed, etc when I replaced the cables.
      I'll try to get clear pics of the mobo, both sides.
      Thanks

      Comment

      • selldoor
        Slow Learner
        • Dec 2010
        • 7870

        #4
        Re: Gateway NV59C09U No backlight LED

        OK - but have you tried it with an external display - monitor /tv
        Please upload pictures using attachment function when ask for help on the repair
        http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • Reech
          Member
          • Sep 2012
          • 21
          • United States

          #5
          Re: Gateway NV59C09U No backlight LED

          Yes, no problem with external display.
          I am attaching two pics of the mobo.
          Thanks
          Attached Files

          Comment

          • selldoor
            Slow Learner
            • Dec 2010
            • 7870

            #6
            Re: Gateway NV59C09U No backlight LED

            IMPORTANT These pics look to be taken on an antistatic bag?
            and the cmos battery is in?

            Antistatic bags are slightly conductive and can short out sensitive components.
            Please upload pictures using attachment function when ask for help on the repair
            http://www.badcaps.net/forum/showthread.php?t=39740

            Comment

            • Reech
              Member
              • Sep 2012
              • 21
              • United States

              #7
              Motherboard: NEW90 L21 No backlight LED

              I had a second post which had the motherbord model above that was flagged as a duplicate. On Friday 1/24/14 I checked it at work and there were several replies.
              When I got home from work that "post" had been removed along with the replies that I was going to try and repair the mobo with.
              How can I get this back?

              Thank you

              Comment

              • trebo
                Badcaps Veteran
                • Feb 2010
                • 514
                • Wales, UK

                #8
                Re: Motherboard: NEW90 L21 No backlight LED

                Originally posted by Reech
                I had a second post which had the motherbord model above that was flagged as a duplicate. On Friday 1/24/14 I checked it at work and there were several replies.
                When I got home from work that "post" had been removed along with the replies that I was going to try and repair the mobo with.
                How can I get this back?

                Thank you
                it is still there, here is link, https://www.badcaps.net/forum/showth...618#post412618

                Comment

                • dj_ricoh
                  Badcaps Legend
                  • Jan 2013
                  • 2073
                  • uk

                  #9
                  Re: Gateway NV59C09U No backlight LED

                  get some sharp probes and write down the voltage from LCD connector!
                  1=
                  2=
                  .
                  .
                  40=
                  Just cook it! It's already broken.

                  Comment

                  • Reech
                    Member
                    • Sep 2012
                    • 21
                    • United States

                    #10
                    Re: Gateway NV59C09U No backlight LED

                    Wow, those contacts are way too tiny for my meter, I can't even try it.
                    Don't want to fry the mobo!
                    Anyone have a tip on checking voltage at the led backlight?
                    Last edited by Reech; 02-03-2014, 10:44 AM.

                    Comment

                    • Reech
                      Member
                      • Sep 2012
                      • 21
                      • United States

                      #11
                      Re: Gateway NV59C09U No backlight LED

                      Does anyone know where I can check for the LED backlight voltage at both the motherboard and the display so I can trace the problem to one of these components.

                      Comment

                      • spidey
                        climbs
                        • Dec 2012
                        • 644
                        • Cyprus

                        #12
                        Re: Gateway NV59C09U No backlight LED

                        first we need schematic to say that. what is the mobo code ?

                        Comment

                        • Reech
                          Member
                          • Sep 2012
                          • 21
                          • United States

                          #13
                          Re: Gateway NV59C09U No backlight LED

                          Spidey, I have a duplicate post (I have left note to use this one) that has the schematic https://www.badcaps.net/forum/showthr...618#post412618
                          See Khaank's response 1/21/14. Mobo is: New90 L21.

                          Comment

                          • spidey
                            climbs
                            • Dec 2012
                            • 644
                            • Cyprus

                            #14
                            Re: Gateway NV59C09U No backlight LED

                            when i click the link, what i see is a dog smoking cigarette.

                            Comment

                            • spidey
                              climbs
                              • Dec 2012
                              • 644
                              • Cyprus

                              #15
                              Re: Gateway NV59C09U No backlight LED

                              check page 22, LCD panel conn. pins 1,2,3 - 8 and 9

                              Comment

                              • Reech
                                Member
                                • Sep 2012
                                • 21
                                • United States

                                #16
                                Re: Gateway NV59C09U No backlight LED

                                Spidey, Thanks I'll check this out tonight!
                                The other link is in a response from trebo dated 1/25/14.

                                Comment

                                • Reech
                                  Member
                                  • Sep 2012
                                  • 21
                                  • United States

                                  #17
                                  Re: Gateway NV59C09U No backlight LED

                                  I just tried another working display and I get the same result, no backlight but I can faintly see images on screen.

                                  Comment

                                  • Reech
                                    Member
                                    • Sep 2012
                                    • 21
                                    • United States

                                    #18
                                    Re: Gateway NV59C09U No backlight LED

                                    Tried again last night, the orig. display works fine on a known good laptop.
                                    The known good display has the same no backlight on the problem laptop.
                                    So problem is with the motherboard.
                                    If anyone has any idea of a fuse or something on the mobo, this one is toast!

                                    Thanks to everybody that responded, your help is much appreciated.

                                    Comment

                                    • dj_ricoh
                                      Badcaps Legend
                                      • Jan 2013
                                      • 2073
                                      • uk

                                      #19
                                      Re: Gateway NV59C09U No backlight LED

                                      look if i must say it and nobody will say it i will!!!
                                      do you even understand what we ask?
                                      you need to post what voltage you got on the connector(cable that goes to LCD)

                                      if you don`t understand or don`t know something just say it, that`s why this forum exist.
                                      the best place where you learn.
                                      Just cook it! It's already broken.

                                      Comment

                                      • spidey
                                        climbs
                                        • Dec 2012
                                        • 644
                                        • Cyprus

                                        #20
                                        Re: Gateway NV59C09U No backlight LED

                                        and i already told you what pins to check....

                                        Comment

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