Sharp LC-C5255U No Blink Codes only Black Screen

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  • bigdotbob
    New Member
    • Sep 2015
    • 7
    • USA

    #1

    Sharp LC-C5255U No Blink Codes only Black Screen

    I am able to turn this unit on and it stays on. However, I am not getting any Blink Codes (power LED nor OPC) The power LED stays green but I have no picture. Any troubleshooting info would be greatly appreciated. Thanks. Also I have removed the main power board and did a visual inspection. Did not find anything. Also did the channel up vol down trick with same result. No difference doing that or just hitting the power button.
    Last edited by bigdotbob; 09-25-2015, 10:32 AM. Reason: Forgot pertinent info
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Sharp LC-C5255U No Blink Codes only Black Screen

    No pictures on the screen but you do have backlights?
    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

    • bigdotbob
      New Member
      • Sep 2015
      • 7
      • USA

      #3
      Re: Sharp LC-C5255U No Blink Codes only Black Screen

      No backlights that I can tell. I did however revisit the trouble codes on the tv. Evidently I never left it powered up long enough to get codes. I now get both the power and OPC leds flashing twice together and then the power LED flashes one additional time and then the cycle repeats.

      Comment

      • vinceroger69
        Badcaps Legend
        • Mar 2012
        • 6714
        • uk

        #4
        Re: Sharp LC-C5255U No Blink Codes only Black Screen

        Service manual may be close enough for the error codes:
        https://docs.google.com/file/d/0B3xF...YkU/edit?pli=1
        Pictures of the whole back side of the TV will help.
        Lots of boards used in the same model as your and in LC52SB55U.

        This was posted by budm in another thread but the same tv as yours.

        also found this that may help
        https://www.badcaps.net/forum/showth...harp+LC-C5255U
        Last edited by vinceroger69; 09-28-2015, 07:22 AM.

        Comment

        • bigdotbob
          New Member
          • Sep 2015
          • 7
          • USA

          #5
          Re: Sharp LC-C5255U No Blink Codes only Black Screen

          Here are excerpts from the Sharp Service manual concerning the LED/OPC codes. Also I'll take full pics later tonight of the main board and post tomorrow.

          According to the manual (assuming I am reading it right) my codes are:

          Power LED flashes 3 times. Communication failure with main CPU. See Codes and Codes3

          OPC LED flashes 2 times. DET_D3V3 failure. D3.3V not applied at CPU (pin 36) See Codes 2.
          Attached Files

          Comment

          • vinceroger69
            Badcaps Legend
            • Mar 2012
            • 6714
            • uk

            #6
            Re: Sharp LC-C5255U No Blink Codes only Black Screen

            Maybe budm will have a idea what too check next as he was helping in the thread i posted in post 4.

            Comment

            • bigdotbob
              New Member
              • Sep 2015
              • 7
              • USA

              #7
              Re: Sharp LC-C5255U No Blink Codes only Black Screen

              Wasn't able to take images. camera was dead. phone camera images were not good enough to see the detail required. have a new battery charged and ready. Also after reading the previous posts from jkmorek about a similar issue I am going to work through those steps and add the results here along with the board images.
              Last edited by bigdotbob; 09-30-2015, 11:03 AM. Reason: More info

              Comment

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