Have I been sold a faulty T-con

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  • blib
    Senior Member
    • Feb 2012
    • 56
    • UK

    #1

    Have I been sold a faulty T-con

    Hi guys. I would appreciate your advise on this one.
    The TV is a LG42LH3000 with the left hand 50% of the screen being black. The fault is intermittent and tapping the Tcon board or surrounding area will clear the fault for a while.I have just replaced the Tcon which came from Ebay.I still have the same fault.Have I been sold a dud as I thought only the Tcon can cause this.
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Have I been sold a faulty T-con

    Left hand screen black or just dark, with a visible picture? Sharp cut off between sides or gradual? Sounds more like panel, sadly...
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

    • JimmysTGP
      Member
      • May 2012
      • 45
      • US

      #3
      Re: Have I been sold a faulty T-con

      Yes, if you have replace the T-con and results the same then Panel was the problem originally. Sometimes I have been able to manipulate by Jamming something behind the TCP ribbon cable thats causing the Bad connection. However its not Permanent fix.

      Comment

      • blib
        Senior Member
        • Feb 2012
        • 56
        • UK

        #4
        Re: Have I been sold a faulty T-con

        Yes Tom sharp cut off between sides. Left hand side completely dark.I have a feeling could be bad soldering on the tcon.Maybe its a common fault.I have just tried to reflow the ics on the board.Working at the moment.Fingers crossed.

        Comment

        • Mt.Man
          Senior Member
          • Jun 2012
          • 53
          • USA

          #5
          Re: Have I been sold a faulty T-con

          Try reseating the ribbon cables from the panel to the Tcon.

          Comment

          • blib
            Senior Member
            • Feb 2012
            • 56
            • UK

            #6
            Re: Have I been sold a faulty T-con

            Yes have done that and cleaned with contact cleaner.

            Comment

            • multimeter
              Badcaps Veteran
              • Jan 2011
              • 739
              • united kingdom

              #7
              Re: Have I been sold a faulty T-con

              also,try blasting some freeze spray on the panel ribbons if fault dissapears you at least know the panel is faulty,strange though that tapping the t con makes it better,as that wouldnt cause any movement on the panel ribbons, lvds yes,it must take quite a whack on the t con to make the fault dissapear
              fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

              ----------------------------------------------
              please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

              Comment

              • blib
                Senior Member
                • Feb 2012
                • 56
                • UK

                #8
                Re: Have I been sold a faulty T-con

                It did not take much of a tap,mainly on the big ic in the middle of the board.I think the replacement board has the same issue.Will keep you posted.

                Comment

                • multimeter
                  Badcaps Veteran
                  • Jan 2011
                  • 739
                  • united kingdom

                  #9
                  Re: Have I been sold a faulty T-con

                  hmm sounds like a dry ic then ,that would be a good fix,did you use hot air and flux?
                  fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

                  ----------------------------------------------
                  please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

                  Comment

                  • blib
                    Senior Member
                    • Feb 2012
                    • 56
                    • UK

                    #10
                    Re: Have I been sold a faulty T-con

                    Yes.Hope the repair does not bounce

                    Comment

                    • selldoor
                      Slow Learner
                      • Dec 2010
                      • 7870

                      #11
                      Re: Have I been sold a faulty T-con

                      Originally posted by multimeter
                      also,try blasting some freeze spray on the panel ribbons if fault dissapears you at least know the panel is faulty,
                      @Multimeter -Bit off topic but how does that work?
                      Please upload pictures using attachment function when ask for help on the repair
                      http://www.badcaps.net/forum/showthread.php?t=39740

                      Comment

                      • multimeter
                        Badcaps Veteran
                        • Jan 2011
                        • 739
                        • united kingdom

                        #12
                        Re: Have I been sold a faulty T-con

                        Originally posted by selldoor
                        @Multimeter -Bit off topic but how does that work?
                        the freeze will crush up the bond between the ribbons and its contacts
                        fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

                        ----------------------------------------------
                        please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

                        Comment

                        • selldoor
                          Slow Learner
                          • Dec 2010
                          • 7870

                          #13
                          Re: Have I been sold a faulty T-con

                          Originally posted by multimeter
                          the freeze will crush up the bond between the ribbons and its contacts
                          Ok - thanks - would heating have a similar effect?
                          Please upload pictures using attachment function when ask for help on the repair
                          http://www.badcaps.net/forum/showthread.php?t=39740

                          Comment

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