Lcd TV flickering. Any ideas ?

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  • Danvagos
    Senior Member
    • Aug 2016
    • 76
    • USA

    #1

    Lcd TV flickering. Any ideas ?

    I used this form about a week or two ago to repair in olevia 65 inch TV and it's been great but today after work I turned it on and the top of the screen was slightly flickering and stopped in like a minute or two. Is this somthing to worry about ? Is it the fluorescent tubes ? I did put a main board in witch was not the problem then a t-com board witch was not the problem it was two of the transformer boards. Now I did have a problem with the screen after I change the T COM board it was all different colors I guess I didn't have a ribbon cable in all the way but after sum playing I got that fixed. I did check the power output of both power supplies and the power was all where it should be and within specs. The TV through all of its life has had a very expensive monster power surge protector on it. And no caps looked to be bad even in the slightest. Please let me know what you think also the tv is 8 years old I don't know if that makes a difference.
  • ReeceyBurger123
    Never Give Up !
    • May 2014
    • 7325
    • Britain

    #2
    Re: Lcd TV flickering. Any ideas ?

    Model number please ? Pictures of the boards in the set ? Is the backlight flickering or the Lcd if the backlight is it will be visable through the back of the set ?
    Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

    https://www.facebook.com/Telford-Tel...7894576335359/

    Comment

    • ReeceyBurger123
      Never Give Up !
      • May 2014
      • 7325
      • Britain

      #3
      Re: Lcd TV flickering. Any ideas ?

      If the model is 265T or similar I remember these do have issues with the inverter transformers failing causing backlight issues.
      Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

      https://www.facebook.com/Telford-Tel...7894576335359/

      Comment

      • Danvagos
        Senior Member
        • Aug 2016
        • 76
        • USA

        #4
        Re: Lcd TV flickering. Any ideas ?

        Yes 265fhd when One of the Transformers let go of the TV would go straight to black after two seconds. I believe I have fixed that problem because we have been watching the TV for over a week and we have not had a problem just noticed the top of the screen flickering a little bit today. Goes away within a minute. Is it a sign of a dad tube inside the TV or do I still possibly have another transformer problem ? How long does the tubes usually last and when they die they just completely shut off.

        Comment

        • Danvagos
          Senior Member
          • Aug 2016
          • 76
          • USA

          #5
          Re: Lcd TV flickering. Any ideas ?

          This seems to be a totally different problem before it would just shut down.

          Comment

          • Danvagos
            Senior Member
            • Aug 2016
            • 76
            • USA

            #6
            Re: Lcd TV flickering. Any ideas ?

            Also I only had the tv on for like 5 minutes then I just let it cool down and turned it back on ad it dose not flicker don't know it that helps

            Comment

            • ReeceyBurger123
              Never Give Up !
              • May 2014
              • 7325
              • Britain

              #7
              Re: Lcd TV flickering. Any ideas ?

              Well we need to know if its the backlight or Lcd first.
              Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

              https://www.facebook.com/Telford-Tel...7894576335359/

              Comment

              • Danvagos
                Senior Member
                • Aug 2016
                • 76
                • USA

                #8
                Re: Lcd TV flickering. Any ideas ?

                How do I tell

                Comment

                • ReeceyBurger123
                  Never Give Up !
                  • May 2014
                  • 7325
                  • Britain

                  #9
                  Re: Lcd TV flickering. Any ideas ?

                  When the Tv is on can you see the backlight through the back chassis ? Helps if your in a dark room as well. If not then try switching the Tv to a full black screen which as its Lcd will be illuminated blue by the backlight, switch the lights off in the room and see if the flickering area is going totally black or staying backlit but the flickering is on the Lcd.
                  Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

                  https://www.facebook.com/Telford-Tel...7894576335359/

                  Comment

                  • Danvagos
                    Senior Member
                    • Aug 2016
                    • 76
                    • USA

                    #10
                    Re: Lcd TV flickering. Any ideas ?

                    It was not like a fluorescent light trying to come on I would consider that a on off type flicker this was not a on off flicker

                    Comment

                    • Danvagos
                      Senior Member
                      • Aug 2016
                      • 76
                      • USA

                      #11
                      Re: Lcd TV flickering. Any ideas ?

                      Like I said I just had it off for 10 15 and now it did not do it

                      Comment

                      • ReeceyBurger123
                        Never Give Up !
                        • May 2014
                        • 7325
                        • Britain

                        #12
                        Re: Lcd TV flickering. Any ideas ?

                        Sounds like the Lcd then, I cant help further until you check it out.
                        Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

                        https://www.facebook.com/Telford-Tel...7894576335359/

                        Comment

                        • Danvagos
                          Senior Member
                          • Aug 2016
                          • 76
                          • USA

                          #13
                          Re: Lcd TV flickering. Any ideas ?

                          Ok I will try to check it. What if it dose not flicker all the time how can I test it

                          Comment

                          • Danvagos
                            Senior Member
                            • Aug 2016
                            • 76
                            • USA

                            #14
                            Re: Lcd TV flickering. Any ideas ?

                            Ok I tryed it with the contrast in the brightness all the way down and all I see is the light coming from the back light no flickering

                            Comment

                            • Danvagos
                              Senior Member
                              • Aug 2016
                              • 76
                              • USA

                              #15
                              Re: Lcd TV flickering. Any ideas ?

                              So I just turned the tv on this morning and nothing it came right on with no flickering. I don't get it

                              Comment

                              • CapLeaker
                                Leaking Member
                                • Dec 2014
                                • 8146
                                • Canada

                                #16
                                Re: Lcd TV flickering. Any ideas ?

                                Don't worry about it. Sometimes TV's and monitors will flicker a little bit in a corner and disappear after a few seconds. That is acceptable on CCFL's. Don't forget, CCFLs age and they probably have quite a few hours on them too. I have a monitor that flickers a bit on the bottom corner when turned on for 3 seconds. So far The monitor is 9 years old and never missed a beat.

                                That Olevia is getting up in age too. I don't think it owes you much anymore. Keep her running until she quits.
                                Last edited by CapLeaker; 09-02-2016, 06:07 AM.

                                Comment

                                • Danvagos
                                  Senior Member
                                  • Aug 2016
                                  • 76
                                  • USA

                                  #17
                                  Re: Lcd TV flickering. Any ideas ?

                                  I talked with my aunt that on the TV before me and according to her the TV may have been on for 4 to 5 hours a day even if you say the TV was on for seven hours today at eight years that's only 20,000 hours. the TV from what I read should last around 60 or 70,000 hours is that correct

                                  Comment

                                  • budm
                                    Badcaps Legend
                                    • Feb 2010
                                    • 40746
                                    • USA

                                    #18
                                    Re: Lcd TV flickering. Any ideas ?

                                    CCFL is rated at 50K hour, you can see that in the LCD panel spec sheet, but in the real world they do not. Worn out lamp will have blackened ends and will start drawing more current, just like your home CFL. Lytics cap does not last that long either.
                                    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

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