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Dell Inspiron N5110 No LED backlight

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    #1

    Dell Inspiron N5110 No LED backlight

    I have this dell N5110 that powers up nice but no backlight, but when you put a
    Flashlight behind the screen you can see that there is video.when connected via HDMI to external monitor, it has nice and sharp video.what could be the problem please
    Tags: None
    #2
    Re: Dell Inspiron N5110 No LED backlight

    U have to check the Inverter and CFL lights on LCD

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      #3
      Re: Dell Inspiron N5110 No LED backlight

      Any pictures so we can see what we are dealing with?
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

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        #4
        Re: Dell Inspiron N5110 No LED backlight

        I believe that's a laptop. You want to be over in the "Troubleshooting Laptops & Notebooks" section.
        https://www.badcaps.net/forum/forumdisplay.php?f=23

        But, to answer your question....if the video shows up on an external monitor, but doesn't light up on the laptop. The chances are you either have an inverterthat is out; or a ccfl that is out. That's usually not a very expensive repair.

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          #5
          Re: Dell Inspiron N5110 No LED backlight

          The N5110 doesn't have an inverter board, so it's either the panel or motherboard (can also be cable, but is rare). If you turn the system off and hold down the "D" key on the keyboard while powering the system back on, the LCD BIST will run and test the LCD independent of the video controller. If you see the same result the panel is bad.

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            #6
            Re: Dell Inspiron N5110 No LED backlight

            I didn't realize the model when I posted yesterday. I have probably seen a dozen of this particular model with a dim backlight caused by the LCD cable being slightly unseated at the motherboard. Before you buy replacement parts I would highly suggest that you take the palmrest off and re-seat the cable.

            The LCD cable doesn't have any slack on this model and the rocking off opening the LCD over and over tends so unseat them quite a bit. I'll attach a picture of it in its native habitat. If you re-seat it and it works, I "kapton tape" the hell out of them and they seem to hold up well.
            Attached Files

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              #7
              Re: Dell Inspiron N5110 No LED backlight

              I am, too, having the same issue. I see display on screen but no backlight. The fuses new the screen connector, on the MB, has 19v. Replaced screen cable but same. What else to test? LED Driver?
              Full-time computer repair tech (10am - 6pm) and full-time, (8am - 11pm), Ruby on Rails Developer

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                #8
                Re: Dell Inspiron N5110 No LED backlight

                dell vostro 1015 having the same issue
                screen backlight not work how to solve this problem

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