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Insignia NS-50DR620NA18 vertical colored lines no picture

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    Insignia NS-50DR620NA18 vertical colored lines no picture

    Insignia NS-50DR620NA18 has vertical colored lines, no picture. swapped out tcon board but same issue.



    Attached Files

    #2
    Re: Insignia NS-50DR620NA18 vertical colored lines no picture

    Welcome to Badcaps!

    Can you give some history on this TV unit?
    - Did this just happen one day?
    - Did you get this used?
    - What's the ORIGINAL T-CON part number, whats the NEW T-CON part number?
    Last edited by ngth82; 04-03-2020, 03:56 PM.
    -Thomas
    I'm a hardware engineer focused on networking equipment for my day job. I void warranties and fix consumer electronics for fun.

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      #3
      Re: Insignia NS-50DR620NA18 vertical colored lines no picture

      Purchased used. Trying to fix. New tcon and old tcon are the same as I made shopjimmy check 55t32-c0f. The menu seems to scroll behind the bars/lines. Can not see though. I think the tv is 3 years old.







      Attached Files
      Last edited by daxlw; 04-03-2020, 04:18 PM.

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        #4
        Re: Insignia NS-50DR620NA18 vertical colored lines no picture

        Tt

        Comment


          #5
          Re: Insignia NS-50DR620NA18 vertical colored lines no picture

          Any idea if the original owner took this thing apart?

          With the back cover removed and the TV on, what happens if you lightly press on the flex cables between the LCD display and the narrow PCBs that connect to the LCD? Does it change the output behavior?

          (Example picture attached).
          Attached Files
          -Thomas
          I'm a hardware engineer focused on networking equipment for my day job. I void warranties and fix consumer electronics for fun.

          Comment


            #6
            Re: Insignia NS-50DR620NA18 vertical colored lines no picture

            Originally posted by daxlw View Post
            Insignia NS-50DR620NA18 has vertical colored lines, no picture. swapped out tcon board but same issue.



            with my experience, vertical colored lines are cause by main board failures. tcon board issues are usually either no picture or half of a good picture. from your picture however, they didnt look like colored lines i usually see. being that you replaced the tcon, that leaves the main board and the display panel itself. main board is cheaper, id start there.

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              #7
              Re: Insignia NS-50DR620NA18 vertical colored lines no picture

              I applied pressure to the PCBs and there was not a change.

              Comment


                #8
                Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                Replaced main board and tcon. same issue. possible new tcon is bad?



                Attached Files

                Comment


                  #9
                  Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                  Vertical lines are usually signs of a bad panel. You can try powering up one side of the screen at a time by disconnecting the ribbon cable and see if one side shows a good picture.

                  Comment


                    #10
                    Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                    yes. Half the panel works with one side ribbon off.

                    Is it worth fixing?
                    Attached Files

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                      #11
                      Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                      What do you get when you do the same to the other side??

                      Comment


                        #12
                        Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                        I get the colored vertical lines on that half

                        Comment


                          #13
                          Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                          Did you remove the metal frame of the LCD panel assembly to get the tab bonding board (as shown on post 5) and inspect them? Right now the problem is the LCD panel not T-CON or main board.
                          Can we the whole backside of the TV showing all the boards?
                          Is the tab bonding board located on the top or the bottom edge of the LCD panel?
                          Last edited by budm; 04-07-2020, 04:14 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


                            #14
                            Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                            Check the MLCC caps on the driver board between the tcon and panel for low ohms, ohm mode with tv unplugged from power.
                            Last edited by nomoresonys; 04-07-2020, 04:16 PM.

                            Comment


                              #15
                              Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                              The narrow pcb's are on the bottom. I pressed them and it did not have any change. I will inspect again. I do not have any way to detect ohms.

                              Comment


                                #16
                                Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                                Big problem when it comes to testing and finding out what's wrong, I'd grab a digital multimeter from one of the big box stores, about 10 bucks or so.

                                Comment


                                  #17
                                  Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                                  I will see if I can get one but what would be the steps and likely issues from here and fixes?

                                  Comment


                                    #18
                                    Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                                    There's a ton of posts here regarding that, basically if you find one reading off, involves removing the small MLCC caps on the board one at a time and checking it and rechecking the rest on the board, til you find the right one, they are in series so one bad one can make others read bad. It could also be a different problem on the panel but many times it was just one of those silly little caps at fault.
                                    Last edited by nomoresonys; 04-07-2020, 05:12 PM.

                                    Comment


                                      #19
                                      Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                                      Can they be replaced or repaired? What search words would you use on the forum? caps? pcbs?

                                      Comment


                                        #20
                                        Re: Insignia NS-50DR620NA18 vertical colored lines no picture

                                        Well, if you do not have meter to check the resistance of the caps on the tab bonding then you will have bigger problem removing the bad caps and install new caps due to lack of tools and experience.
                                        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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