KDL-40EX723 Dimmer Screen Top Right Corner

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  • anotherdude
    Badcaps Veteran
    • Feb 2013
    • 488
    • uk

    #1

    KDL-40EX723 Dimmer Screen Top Right Corner

    Anyone able to provide some help with this before I begin taking it apart.

    Basically the top right corner of the screen has became dark, sometimes if you leave it off for a day it'll kick back in but only ever lasts a hour tops.

    Is this just dead/dying leds?
    Attached Files
  • Andrew F. Ali
    Badcaps Legend
    • Jan 2014
    • 2450
    • Trinidad & Tobago

    #2
    Re: KDL-40EX723 Dimmer Screen Top Right Corner

    Bad Backlights. You would have to crack open the Panel and change out the backlights.

    Comment

    • anotherdude
      Badcaps Veteran
      • Feb 2013
      • 488
      • uk

      #3
      Re: KDL-40EX723 Dimmer Screen Top Right Corner

      Originally posted by Andrew F. Ali
      Bad Backlights. You would have to crack open the Panel and change out the backlights.
      I thought as much, thanks for confirming.

      Are they generic or model specific?

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: KDL-40EX723 Dimmer Screen Top Right Corner

        Try turning down backlights to as low as possible but still watchable and see if it will work OK without dimming down in that section for long period of time. If it is OK then I would use it until the LED fail completely.
        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

        Comment

        • anotherdude
          Badcaps Veteran
          • Feb 2013
          • 488
          • uk

          #5
          Re: KDL-40EX723 Dimmer Screen Top Right Corner

          Originally posted by budm
          Try turning down backlights to as low as possible but still watchable and see if it will work OK without dimming down in that section for long period of time. If it is OK then I would use it until the LED fail completely.
          Tried that already, its got to the point now were it works when it feels like, sometimes I'll get flickering then nothing othertimes it'll flicker then work for a bit

          Comment

          • anotherdude
            Badcaps Veteran
            • Feb 2013
            • 488
            • uk

            #6
            Re: KDL-40EX723 Dimmer Screen Top Right Corner

            Just a bit of a update on this

            Fiddled with the settings a little, set the Eco Power setting to low or high and setting the scene as cinema seems to fix the issue, I went for the low eco power, as I can still adjust the backlight to 5 to prevent flickering and still have half decent brightness.

            Comment

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