LG 43UK6200PLA - yellowish picture

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  • tomislav4545
    Member
    • Jul 2022
    • 11
    • Croatia
    #1

    LG 43UK6200PLA - yellowish picture

    Hi everyone. I have LG 43UK6200PLA which stopped showing picture a while ago. The main board is model EAX67872805. It has sound and backlight. I tested the two ribbon cables on the tcon board and concluded that one of them is faulty. I taped pins 1-12 and now the picture is there and there are no glitchy lines. The problem is it switches from normal color to yellowish color repeatedly. In the attached photos the first one is normal color and the second one is changed color. Any suggestion is welcome.

    Thank you all.
    Attached Files
    Tags: None
    • nomoresonys
      Badcaps Legend
      • Jan 2013
      • 12206
      • U.S.
      #2
      Re: LG 43UK6200PLA - yellowish picture

      maybe try unblocking one line at a time like go to 11 etc: https://www.youtube.com/watch?v=pfrRhw7-ZII
      Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

        Comment

        • tomislav4545
          Member
          • Jul 2022
          • 11
          • Croatia
          #3
          Re: LG 43UK6200PLA - yellowish picture

          I did that and it looks like pin 9 is the general problem. When I block only pin 9 the colors are fine but there are pruple vertical lines when screen is black and normal lines when there is picture. Also there is one black line that doesnt change.
          Attached Files

            Comment

            • alfatv
              Badcaps Veteran
              • Sep 2020
              • 353
              • Canada
              #4
              Re: LG 43UK6200PLA - yellowish picture

              Originally posted by tomislav4545
              I tested the two ribbon cables on the tcon board and concluded that one of them is faulty.

              Thank you all.
              If cable is faulty, you need to replace it

                Comment

                • tomislav4545
                  Member
                  • Jul 2022
                  • 11
                  • Croatia
                  #5
                  Re: LG 43UK6200PLA - yellowish picture

                  Originally posted by alfatv
                  If cable is faulty, you need to replace it
                  My bad, I worded that a bit badly. I meant that when I connect one cable only I get half screen normal white and when I connect only second cable it doesn't work correctly. The cables themself are ok.

                    Comment

                    • nomoresonys
                      Badcaps Legend
                      • Jan 2013
                      • 12206
                      • U.S.
                      #6
                      Re: LG 43UK6200PLA - yellowish picture

                      maybe play with it, like block 1-9, 2-9, 3-9 etc.
                      Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                        Comment

                        • tomislav4545
                          Member
                          • Jul 2022
                          • 11
                          • Croatia
                          #7
                          Re: LG 43UK6200PLA - yellowish picture

                          After blocking pins 9 and 11 I get a normal picture without lines, but there is slight flickering. Also I noticed if I block pin 12 (along side 9 and 11) the colors change between normal and yellowish like at the beginning. Other pins don't seem to have any effect on colors or flickering. I have no idea what to do now.

                            Comment

                            • nomoresonys
                              Badcaps Legend
                              • Jan 2013
                              • 12206
                              • U.S.
                              #8
                              Re: LG 43UK6200PLA - yellowish picture

                              I wonder if the flickering might be a separate backlight issue?
                              Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                Comment

                                • nomoresonys
                                  Badcaps Legend
                                  • Jan 2013
                                  • 12206
                                  • U.S.
                                  #9
                                  Re: LG 43UK6200PLA - yellowish picture

                                  did it flicker when you did the half screen test?
                                  Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                    Comment

                                    • nomoresonys
                                      Badcaps Legend
                                      • Jan 2013
                                      • 12206
                                      • U.S.
                                      #10
                                      Re: LG 43UK6200PLA - yellowish picture

                                      something to try, go into settings and turn off all energy saving settings/modes.
                                      Last edited by nomoresonys; 07-31-2022, 06:19 PM.
                                      Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                        Comment

                                        • nomoresonys
                                          Badcaps Legend
                                          • Jan 2013
                                          • 12206
                                          • U.S.
                                          #11
                                          Re: LG 43UK6200PLA - yellowish picture

                                          also for testing have nothing plugged into it like hdmi cables etc. see if it still flickers, some lgs have picture test, something like settings-support-screen diagnose.
                                          Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                            Comment

                                            • tomislav4545
                                              Member
                                              • Jul 2022
                                              • 11
                                              • Croatia
                                              #12
                                              Re: LG 43UK6200PLA - yellowish picture

                                              When I did the half screen test it did flicker on the faulty side. Energy saving was on and when I switched it off it only brightened the screen a bit and nothing else. It was tested without any cables just power.

                                                Comment

                                                • nomoresonys
                                                  Badcaps Legend
                                                  • Jan 2013
                                                  • 12206
                                                  • U.S.
                                                  #13
                                                  Re: LG 43UK6200PLA - yellowish picture

                                                  .
                                                  Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                                    Comment

                                                    • tomislav4545
                                                      Member
                                                      • Jul 2022
                                                      • 11
                                                      • Croatia
                                                      #14
                                                      Re: LG 43UK6200PLA - yellowish picture

                                                      I found this video: https://www.youtube.com/watch?v=ESGYMioW4yQ
                                                      Does anyone have any idea what is he doing? I watched it a few times but don't understand what does he check when probing left and right side at the same time. Also what should the voltages be at those resistors?

                                                        Comment

                                                        • Davi.p
                                                          Hobbist Tech
                                                          • Sep 2009
                                                          • 4346
                                                          • Italy - Milan
                                                          #15
                                                          Re: LG 43UK6200PLA - yellowish picture

                                                          A very slight flickering it's normal in these faults with tape method, you must accept it, the screen is not fully repairable, maybe the best method is drilling method but i haven't fully tested until now.

                                                            Comment

                                                            • nomoresonys
                                                              Badcaps Legend
                                                              • Jan 2013
                                                              • 12206
                                                              • U.S.
                                                              #16
                                                              Re: LG 43UK6200PLA - yellowish picture

                                                              maybe turn the backlights and or brightness down to try to get rid of the flicker, maybe even turn those up a little to see if it lessens but down would be better if it would work.
                                                              Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                                                Comment

                                                                • tomislav4545
                                                                  Member
                                                                  • Jul 2022
                                                                  • 11
                                                                  • Croatia
                                                                  #17
                                                                  Re: LG 43UK6200PLA - yellowish picture

                                                                  Originally posted by Davi.p
                                                                  A very slight flickering it's normal in these faults with tape method, you must accept it, the screen is not fully repairable, maybe the best method is drilling method but i haven't fully tested until now.
                                                                  What is the drilling method? I am probably going to leave it as is for now. It is watchable and if you don't look for flickering it's not that noticeable.

                                                                    Comment

                                                                    • tomislav4545
                                                                      Member
                                                                      • Jul 2022
                                                                      • 11
                                                                      • Croatia
                                                                      #18
                                                                      Re: LG 43UK6200PLA - yellowish picture

                                                                      Originally posted by nomoresonys
                                                                      maybe turn the backlights and or brightness down to try to get rid of the flicker, maybe even turn those up a little to see if it lessens but down would be better if it would work.
                                                                      Changing the brightness didn't do anything.

                                                                        Comment

                                                                        • Davi.p
                                                                          Hobbist Tech
                                                                          • Sep 2009
                                                                          • 4346
                                                                          • Italy - Milan
                                                                          #19
                                                                          Re: LG 43UK6200PLA - yellowish picture

                                                                          sorry that method is not tested , i will explain it when it will be

                                                                            Comment

                                                                            • nomoresonys
                                                                              Badcaps Legend
                                                                              • Jan 2013
                                                                              • 12206
                                                                              • U.S.
                                                                              #20
                                                                              Re: LG 43UK6200PLA - yellowish picture

                                                                              this one fixed it with tape, thought I still saw a slight flicker over the whole screen tho, unless it's just the video effect of the camera: https://www.youtube.com/watch?v=Gau7xTgtWpo
                                                                              Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                                                                Comment

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