rca l40fhd380yx7

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  • showmemule
    Member
    • Jan 2011
    • 16
    #1

    rca l40fhd380yx7

    I have a vertical line that spans the left side of the display, about the size of a thread. On both sides of this line the picture is clear, but has a lighter contrast on the left compared to the right. All caps check good on the board using vom
    Any thoughts? See attached impeg.
    Attached Files
    Tags: None
    • Village Electronics
      OldPro
      • Apr 2011
      • 118
      #2
      Re: rca l40fhd380yx7

      Panel

        Comment

        • showmemule
          Member
          • Jan 2011
          • 16
          #3
          Re: rca l40fhd380yx7

          The panel itself? Whats the reason

            Comment

            • PlainBill
              Badcaps Legend
              • Feb 2009
              • 7034
              • USA
              #4
              Re: rca l40fhd380yx7

              Originally posted by showmemule
              The panel itself? Whats the reason
              A bad driver or a bad bond between the flex circuit and the glass panel; more likely the former. In either case it is considered unrepairable.

              PlainBill
              For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

              Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                Comment

                • showmemule
                  Member
                  • Jan 2011
                  • 16
                  #5
                  Re: rca l40fhd380yx7

                  What is a flex circuit, and is there a hidden menu for this unit I can play with to adjust for driver probs?

                    Comment

                    • rayrod81
                      Badcaps Veteran
                      • Oct 2010
                      • 205
                      #6
                      Re: rca l40fhd380yx7

                      No, this failure is purely a mechanical failure and cannot be fixed through any menu. The flex circuit is the ribbon that connects to the glass panel itself. Once an lcd panel develops a problem like this there is no repair.

                        Comment

                        • PlainBill
                          Badcaps Legend
                          • Feb 2009
                          • 7034
                          • USA
                          #7
                          Re: rca l40fhd380yx7

                          Originally posted by showmemule
                          What is a flex circuit, and is there a hidden menu for this unit I can play with to adjust for driver probs?
                          The heart of an LCD display is a glass panel with LCD cells etched into it. The flex circuit connects the tcon board to the glass panel, and has driver ICs bonded to it.

                          No adjustment is possible, and as far as I know, no repair is possible.

                          PlainBill
                          For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                          Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                            Comment

                            • showmemule
                              Member
                              • Jan 2011
                              • 16
                              #8
                              Re: rca l40fhd380yx7

                              Thanks Plainbill,
                              Did not know of the ribbon connections referred to as a flex circuit. So the tconn is not a possible fix, because the picture is great other than that.

                              Thanks again!

                                Comment

                                • rayrod81
                                  Badcaps Veteran
                                  • Oct 2010
                                  • 205
                                  #9
                                  Re: rca l40fhd380yx7

                                  No it is a panel failure.

                                    Comment

                                    • shepp
                                      Badcaps Veteran
                                      • Mar 2012
                                      • 377
                                      • England
                                      #10
                                      Re: rca l40fhd380yx7

                                      would this be the same if it was on both sides of the screen? or could that be a main board issue?

                                      ive got a lcd with sort of the same but its not as bad as that picture you cant really notice it that much, but its there

                                        Comment

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