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Toshiba 46TL963 3D LED Smart TV - No backlight

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    Toshiba 46TL963 3D LED Smart TV - No backlight

    Hi all

    Hope someone can help. I've got in a Toshiba 46TL963 3D LED TV with no backlight. Has sound, if you shine a torch into the screen you can see the picture. Just over a year old. Could it be a faulty T-Con board ?

    Thanks

    Mark

    #2
    Re: Toshiba 46TL963 3D LED Smart TV - No backlight

    if you can see a picture it isn't the t-con. take a picture of the whole back of the tv and all the individual boards. the problem is with the leds or it isn't getting the signal to turn the leds on.

    Comment


      #3
      Re: Toshiba 46TL963 3D LED Smart TV - No backlight

      Check the 24V to the led driver board, if it has one, and check the fuse on it.
      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


        #4
        Re: Toshiba 46TL963 3D LED Smart TV - No backlight

        ok thanks guys I'll try that.

        Comment


          #5
          Re: Toshiba 46TL963 3D LED Smart TV - No backlight

          Hey guys. Can I post a question here?

          Comment


            #6
            Re: Toshiba 46TL963 3D LED Smart TV - No backlight

            Originally posted by perplexed View Post
            Hey guys. Can I post a question here?
            I think you just did...

            Comment


              #7
              Re: Toshiba 46TL963 3D LED Smart TV - No backlight



              Originally posted by perplexed View Post
              Hey guys. Can I post a question here?
              Create your own thread - stops possible confusion between different faults.
              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


                #8
                Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                Originally posted by mmartell View Post
                I think you just did...
                LOL
                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


                  #9
                  Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                  Originally posted by safesurfer65 View Post
                  Hi all

                  Hope someone can help. I've got in a Toshiba 46TL963 3D LED TV with no backlight. Has sound, if you shine a torch into the screen you can see the picture. Just over a year old. Could it be a faulty T-Con board ?

                  Thanks

                  Mark
                  Ok guys wondering if you can help me out here Tom, Been on the tvs for 20 years + now, just got one of these in, have a backlight with good picture from anywhere between 5 to 25 mins then the set will start to flicker then the backlight goes of. Picture is still there, I have checked all voltages and they are correct. I then changed the inverter board with no effect, i then tried the PSU thinking it may have an internitent fault but the same again. i doubt it is the main board?? so you think im looking at stripping the tv down to the LEDS and going through them!! id rather not but just thought i would take opinions on it.
                  Thanks guys for any help

                  Comment


                    #10
                    Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                    Prob the LED chains--one or two going intermittent...

                    Common issue it seems, the LED's are chained in series--One out--All out!--Bit like 70's Union members!
                    TELEFIX

                    How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
                    http://www.irf.com/technical-info/appnotes/an-1088.pdf
                    PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

                    Comment


                      #11
                      Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                      Yes, i thought so Alastair!! well here goes to a strip down!!! lol

                      Comment


                        #12
                        Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                        About the only thing it can be--if there's supply to 'em and they go out with supply staying there!
                        TELEFIX

                        How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
                        http://www.irf.com/technical-info/appnotes/an-1088.pdf
                        PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

                        Comment


                          #13
                          Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                          Yes they do mate, 24v still there and 3.4v signal. what a nightmare!

                          Comment


                            #14
                            Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                            @wadclip:
                            Please upload the pictures of your LED driver board and the pictures of the whole backside of your TV.
                            24V is probably for feeding the LED driver board but more likely that this 24V is fed into the Boost converter to get higher Voltages to drive the LED strings.
                            But as we have seen so many threads on LED TV in BC, it is more likely to be bad LED or bad wiring to the LED strings.
                            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


                              #15
                              Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                              Hi
                              Was there a resolution to this issue ? Got same Tv with the same fault.
                              How difficult is it to source and replace LEDS ?

                              Comment


                                #16
                                Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                                Just a quick question if this tv has no backlights but you can see a image if u shine a torch would this still be a possible bad LED bulb or driver board fault ?
                                Thanks

                                Comment


                                  #17
                                  Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                                  Originally posted by sordids999 View Post
                                  Just a quick question if this tv has no backlights but you can see a image if u shine a torch would this still be a possible bad LED bulb or driver board fault ?
                                  Thanks
                                  You will need to diagnose that, what Tv is it ?
                                  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


                                    #18
                                    Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                                    Toshiba 46TL963

                                    Comment


                                      #19
                                      Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                                      Checked the return voltage going to the Led strips ? Is one different from the others ? Will link video showing how to do so if you need help.
                                      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


                                        #20
                                        Re: Toshiba 46TL963 3D LED Smart TV - No backlight

                                        Originally posted by sordids999 View Post
                                        Toshiba 46TL963
                                        How about the pictures of the whole back side of the TV, and each board so I can see how the LED strings are being powered? The OP never upload any pictures for us to see.
                                        Last edited by budm; 12-07-2015, 04:31 PM.
                                        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

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