Hisense 50P6

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  • Diah
    Badcaps Legend
    • Feb 2013
    • 6341
    • Germany

    #101
    Re: Hisense 50P6

    Originally posted by viewerau
    This test conducted with donor boards all in use.
    The screen remained black, no lines, nothing....torch revealed nothing.
    All that was noted was a small spark as the wire connected giving power to the t-con
    Damage doing this
    the test when you did it with original T-CON and PSU you reported full bright white screen with out any lines . now its different. ( put back yours original T-CON & PSU and do the test again)we need to know there are no damage happened to the panel .
    the donor boards i do think now they related to other model or diffrent size which had different panel parameter. just in case compaire all lable of them

    Originally posted by viewerau
    Damage doing this
    as i expected at my post#96 ... any damage to LVDS PINs or ribbon cable. or to the sockets which became not tight enough will cause huge damage beside the effect of line or color pattern on screen.

    Comment

    • viewerau
      Badcaps Veteran
      • May 2020
      • 305
      • Australia

      #102
      Re: Hisense 50P6

      Thanks again.

      I will give all that a go tomorrow morning.

      Cheers
      Signature:Seemingly hopeless tv fixer

      Comment

      • viewerau
        Badcaps Veteran
        • May 2020
        • 305
        • Australia

        #103
        Re: Hisense 50P6

        Out of curiosity whilst conducting these tests, my head needs to know what it is, that causes these led panels to fail?

        Are there common ongoing problems a panel can have, that are nothing to do with the usual external boards and ribbons that we can change and swap around?

        What is the cause of panel failures, and how is it determined that it is a panel that is faulty ?

        I have spent many hours googling about panel failure, but have so far, not been able to find site or link that discusses the reasons in any layman's terms.

        Most just talk about bonding cof issues, and any repairs on these is beyond us without one of those bonding machines they show us.

        I know that I am only a 1% novice, but it beats me as to why the panels have this sort of unrepairable or difficult to fix mechanism after all these years

        I'd appreciate it if anyone can enlighten me on my questions, while in the morning I will try to return the Hisense back to it's old parts and continue to provide the feedback asked for.

        Thanks
        Signature:Seemingly hopeless tv fixer

        Comment

        • Diah
          Badcaps Legend
          • Feb 2013
          • 6341
          • Germany

          #104
          Re: Hisense 50P6

          now days there are just 2 type of panels used on TVs. VA & IPS. and both type related on the way they aligned the crystal cells on the thin film layer.

          the master roll to drive this crystal cells are COFs, and the COFs drived and controlled by panel buffer boards.. the fault at any parts of ceramic Caps on buffer boards will show result as you showed us at last state.. color line move up and down or left to right.. because the signal and currents disrupted. these fault will make COFs as blind cant control the vertical and horizontal job of the crystal cells.

          at your case first thing we were thinking and it may too fault at buffer boards if the panel... but when you did the test and it showed full screen bright white color give us other theory that the signal from MB disrupted.

          Comment

          • viewerau
            Badcaps Veteran
            • May 2020
            • 305
            • Australia

            #105
            Re: Hisense 50P6

            Thanks for the above information...helps me try to understand.

            Back to problem solving.

            I removed all the donor parts and reinstalled all the original parts.

            I am hoping these photo's may help the diagnosis?

            The first 3 photo's show the screen with all the lines at startup(tagged startup)...in this stage backlights are still on

            Next with the tcon disconnected at LVDS (tagged blankscreen)...dull glow to screen, backlights on

            Next set (tagged jumper) etc...same as above, lvds disconnected, backlights are on, and the jumper held between 12v rail on power supply, and other end to P as requested. As said previously, a little spark emits when touching the probe to either the left or right of P. Response was picture jumping into these blue colours.....nothing at any time could be detected with a torch.

            Last one is the video by my wife as I have jumper in place.

            Cheers
            Attached Files
            Signature:Seemingly hopeless tv fixer

            Comment

            • viewerau
              Badcaps Veteran
              • May 2020
              • 305
              • Australia

              #106
              Re: Hisense 50P6

              Video did not attach...try again...nope..says invalid file (mp4)....I'll try another way

              https://1drv.ms/v/s!AmaToYrR3wFwgqhj...yvumA?e=YPYDj9

              https://i.imgur.com/VGK8QBu.mp4
              Last edited by viewerau; 05-11-2023, 09:23 PM.
              Signature:Seemingly hopeless tv fixer

              Comment

              • Diah
                Badcaps Legend
                • Feb 2013
                • 6341
                • Germany

                #107
                Re: Hisense 50P6

                unfortunately you failed by beginner mistake how ever we told you the T-CON should be screwed to chassis & put the jumper in place of T-CON fuse then turn on... what you did just you turn it on and with shaking hand you touch the jumper to t-con. each spark you saw will raise currents toasting T-CON and over load COFs. so you have now absolute dead Panel with toasted one COF or more..
                BTW: if you are lucky.. you could have parts on the buffer boards fault.
                Last edited by Diah; 05-12-2023, 12:50 AM.

                Comment

                • viewerau
                  Badcaps Veteran
                  • May 2020
                  • 305
                  • Australia

                  #108
                  Re: Hisense 50P6

                  Diah....thanks for your reply

                  The tcon board has been screwed to the back of the tv during every test

                  Yes, I did misread and erred in not having the jumper in place without the power being off first.

                  My apology.

                  How can we be sure that the panel is toasted, as from my observations throughout all the processes, it still appears to be behaving no different than it always has?

                  Had the power been off to the tv as detailed, what were we expecting to see or otherwise determine what was going to be the next step? Were we looking for some specific reaction?

                  I try my best, and appreciate it that people are giving me their expertise free of charge and so forth, and for that I am greatful and humbled

                  Surely I can try the test again to see what eventuates, but knowing what reaction I should be looking for may help as I try my very best as an absolute beginner.

                  Thanks

                  EDIT
                  I just fired up the panel again after being out this afternoon

                  It still has exactly the same start up stipes, and with ldvs disconnected from tcon board, it still has backlights, as well as the picture showing black, with dull illumination.
                  Last edited by viewerau; 05-12-2023, 03:35 AM. Reason: last section
                  Signature:Seemingly hopeless tv fixer

                  Comment

                  • Diah
                    Badcaps Legend
                    • Feb 2013
                    • 6341
                    • Germany

                    #109
                    Re: Hisense 50P6

                    Originally posted by viewerau
                    It still has exactly the same start up stipes, and with ldvs disconnected from tcon board, it still has backlights, as well as the picture showing black, with dull illumination.
                    yours TV T-con 12V feed come via LVDS. if you disconnect LVDS, mean T-CON & Panel out from system. so what you see its just reflection of the BL
                    this why when we disconnect LVDS we feed the T-CON with 12V tolet it work with panel as stand alone..

                    on yours Video.. T- CON try to play color pattern R-G-B-W-b, but all of are washed off and one bright dark line on the right side.
                    right now you don't need to try turn the TV on at all.. start with taking the LVDS and the both ribbon cable . photograph the end of them with yours mobile camera as focused close photo.. upload the photos to yours PC and enlarge them by zoom to inspect all pins if one are broken.../ broken mean it could be moved to side made contact to nearest pin or its shorter than other.
                    i faced this disrupted pattern with other TV platform. but it was with T_CON too and one of ribbon was the guilt. try this.

                    Comment

                    • viewerau
                      Badcaps Veteran
                      • May 2020
                      • 305
                      • Australia

                      #110
                      Re: Hisense 50P6

                      Thanks

                      I will do that,however the donor boards all came with the ribbons and connectors, and I have tried swapping those over already, thinking one may be faulty.

                      The swapping hasn't resulted in any changes to date, but I will do as directed.

                      Thanks again for your help.
                      Signature:Seemingly hopeless tv fixer

                      Comment

                      • Diah
                        Badcaps Legend
                        • Feb 2013
                        • 6341
                        • Germany

                        #111
                        Re: Hisense 50P6

                        i had never replaced for test or repair any LVDS or Ribbon cable ONLY after inspect them before use... small issue can drive big on.

                        Comment

                        • Diah
                          Badcaps Legend
                          • Feb 2013
                          • 6341
                          • Germany

                          #112
                          Re: Hisense 50P6

                          after you approved the LVDS and both ribbon are fine... do this test ( in order to know which half of screen are good )

                          1- disconnect LVDS from main boards side... fix your jumper 12 V to T-CON fuse ( use yours original T-CON )t
                          2- disconnect only one ribbon cable ( from T-CON side) of the half screen which it show at yours Video bright line
                          turn on the set and upload photo
                          if- its clear color pattern or one color ... turn off the TV wait little to discharge.. then reverse the ribbon ( connect the bad side and disconnect the good one ) Note : always disconnect ribbon from T-CON side then turn on and let see photo too

                          in case both side are not good displaying..... try do the test same way with yours donor T-CON.

                          Comment

                          • viewerau
                            Badcaps Veteran
                            • May 2020
                            • 305
                            • Australia

                            #113
                            Re: Hisense 50P6

                            Thanks Diah....

                            I think you have pinpointed me to a vital area, as I think, one set of ribbons between the tcon board and the edge board is damaged?

                            I do not have any different small cables from those donor boards for these little strips

                            Could this be the problem you have had me searching for?

                            Should I be searching for a place to buy a replacement strip?

                            Thank you
                            Attached Files
                            Signature:Seemingly hopeless tv fixer

                            Comment

                            • viewerau
                              Badcaps Veteran
                              • May 2020
                              • 305
                              • Australia

                              #114
                              Re: Hisense 50P6

                              Blown up pins

                              This is what I am googling for
                              60 pin E248682 AWM 20941 105C 90V VW-1-F-

                              Is it a hook type , some say forward/reverse....I think mine is reverse(??) but mine has all the writing on the pin side, and the other side is black with blue hook top and tail

                              Confusing to a newbie
                              Attached Files
                              Last edited by viewerau; 05-12-2023, 10:01 PM. Reason: pin info from strip
                              Signature:Seemingly hopeless tv fixer

                              Comment

                              • Diah
                                Badcaps Legend
                                • Feb 2013
                                • 6341
                                • Germany

                                #115
                                Re: Hisense 50P6

                                Originally posted by viewerau
                                Blown up pins

                                This is what I am googling for
                                60 pin E248682 AWM 20941 105C 90V VW-1-F-

                                Is it a hook type , some say forward/reverse....I think mine is reverse(??) but mine has all the writing on the pin side, and the other side is black with blue hook top and tail

                                Confusing to a newbie
                                this one damaged. don't use it and don't use any at same fault shape in future

                                same as this & this

                                Comment

                                • Diah
                                  Badcaps Legend
                                  • Feb 2013
                                  • 6341
                                  • Germany

                                  #116
                                  Re: Hisense 50P6

                                  ribbon cable are straight pins 1-1 not reverse one and never being reverse same to LVDS

                                  Comment

                                  • Diah
                                    Badcaps Legend
                                    • Feb 2013
                                    • 6341
                                    • Germany

                                    #117
                                    Re: Hisense 50P6

                                    you have this one look in good shape... you can use it ( one ribbon only ) to do the test i wrote to you at post #112

                                    Comment

                                    • viewerau
                                      Badcaps Veteran
                                      • May 2020
                                      • 305
                                      • Australia

                                      #118
                                      Re: Hisense 50P6

                                      Thank you.

                                      I have not connected the ribbon cables back onto the t-con since making photos.

                                      I do see lots of ribbon cables, but have not yet found any with the same markings or size after searching google for some time.

                                      I will try keep looking so that I can replace them...wish me luck.
                                      Signature:Seemingly hopeless tv fixer

                                      Comment

                                      • viewerau
                                        Badcaps Veteran
                                        • May 2020
                                        • 305
                                        • Australia

                                        #119
                                        Re: Hisense 50P6

                                        Better photo

                                        Found this...cripes they are dear???
                                        https://www.ebay.com.au/itm/35424522...Bk9SR9DMl8yCYg


                                        Will try your test....... (you have this one look in good shape... you can use it ( one ribbon only ) to do the test i wrote to you at post #112)........ tomorrow
                                        Attached Files
                                        Last edited by viewerau; 05-13-2023, 05:02 AM.
                                        Signature:Seemingly hopeless tv fixer

                                        Comment

                                        • Diah
                                          Badcaps Legend
                                          • Feb 2013
                                          • 6341
                                          • Germany

                                          #120
                                          Re: Hisense 50P6

                                          Originally posted by viewerau
                                          Better photo
                                          right now don't buy ribbon.. just do the test but be careful don't damaged the good one too....
                                          later if you are at the right way again... will tell you how we can fix ribbon ( ONE TIME TRY PLUG IN )

                                          Comment

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