insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

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  • cherokee.warrior
    Senior Member
    • May 2017
    • 87
    • United States

    #1

    insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

    This is a strange tv. It will not power on when pressing the power button. It gives me 7 flashes of the standby light then cycles the 7 flashes again and again. If i leave the tv plugged in it will turn on after a while all on its own. When it does turn on, the menus on the screen are missing any text. when looking at the video on the screen it seems to be slightly blurry. Any thoughts on what is going on? I have tried to find a service manual with no luck so far. Any kind of help would be appreciated.
  • kgavionics
    Senior Member
    • Apr 2017
    • 152
    • Canada

    #2
    Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

    Hi
    can you post some pictures please when the tv is ON.
    next step you have to take the tv apart and check visually if you have some bulging caps on power supply.

    Comment

    • cherokee.warrior
      Senior Member
      • May 2017
      • 87
      • United States

      #3
      Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

      There are no bulging caps. I have tested the voltages running from the power board to the main boards. CN901.
      1 0v
      2 5.2v
      3 5.2v
      4 5.14v
      5 25.01v
      6 24.97v
      7 0v
      8 0v
      9 0v
      10 12.19v
      11 12.15v
      12 0v
      13 0v

      sorry the tv does not have a base and i was holding tv upside-down.
      Attached Files
      Last edited by cherokee.warrior; 07-01-2017, 01:08 PM.

      Comment

      • cherokee.warrior
        Senior Member
        • May 2017
        • 87
        • United States

        #4
        Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

        once tv decides to turn itself on without me doing anything theses are the voltages for cn901.
        1 0v
        2 5.19v
        3 5.19v
        4 5.12v
        5 24.7v
        6 24.7v
        7 0v
        8 0v
        9 0v
        10 12.2v
        11 12.3v
        12 3.20v
        13 4.66v

        Comment

        • dskall
          Badcaps Legend
          • Oct 2016
          • 2905
          • usa

          #5
          Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

          Voltages mean nothing without pin discription
          I assume no responsibility for any stupid suggestions I might post.

          Comment

          • cherokee.warrior
            Senior Member
            • May 2017
            • 87
            • United States

            #6
            Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

            One of the pictures above is the connector in question. Whats in the picture is all i have. Ive been looking for a service manual with no luck.

            Comment

            • dskall
              Badcaps Legend
              • Oct 2016
              • 2905
              • usa

              #7
              Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

              When there is no picture can you see image on screen with flashlight?
              I assume no responsibility for any stupid suggestions I might post.

              Comment

              • cherokee.warrior
                Senior Member
                • May 2017
                • 87
                • United States

                #8
                Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

                here is the connector from the under side of the board.
                Attached Files

                Comment

                • cherokee.warrior
                  Senior Member
                  • May 2017
                  • 87
                  • United States

                  #9
                  Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

                  no. it is not powering on. no image with flashlight. when it decides to turn on then i get image and sound but the menus have no test in them just graphics.

                  Comment

                  • dskall
                    Badcaps Legend
                    • Oct 2016
                    • 2905
                    • usa

                    #10
                    Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

                    You seem to have your ps_on but you lose your backlight signal. With your other problems sounds maybe like eeprom
                    I assume no responsibility for any stupid suggestions I might post.

                    Comment

                    • cherokee.warrior
                      Senior Member
                      • May 2017
                      • 87
                      • United States

                      #11
                      Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

                      I was kind of leaning that way but trying to figure out what is causing it. Here is a picture of the backside of the power board.
                      Attached Files

                      Comment

                      • cherokee.warrior
                        Senior Member
                        • May 2017
                        • 87
                        • United States

                        #12
                        Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

                        front view of power board.
                        Attached Files

                        Comment

                        • cherokee.warrior
                          Senior Member
                          • May 2017
                          • 87
                          • United States

                          #13
                          Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

                          Yes ps on I do have

                          Comment

                          • dskall
                            Badcaps Legend
                            • Oct 2016
                            • 2905
                            • usa

                            #14
                            Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

                            On main board U403 is eeprom. Probably under metal shield. You could try freezing it with air duster upside down and see if it comes on.
                            I'm number one
                            Last edited by dskall; 07-06-2017, 05:34 PM.
                            I assume no responsibility for any stupid suggestions I might post.

                            Comment

                            • attainteddragon
                              Badcaps Veteran
                              • Apr 2013
                              • 764
                              • australia

                              #15
                              Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

                              you can try heating/cooling the main board to see if the missing signals come back when in fault mode, or force the fault on when it is working.


                              looks like dskall beat me to this comment. :P
                              WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?

                              Comment

                              • cherokee.warrior
                                Senior Member
                                • May 2017
                                • 87
                                • United States

                                #16
                                Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

                                I can not find a u403. here are some pictures of the board with the metal cover removed.
                                Attached Files

                                Comment

                                • dskall
                                  Badcaps Legend
                                  • Oct 2016
                                  • 2905
                                  • usa

                                  #17
                                  Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

                                  First picture lower left
                                  I assume no responsibility for any stupid suggestions I might post.

                                  Comment

                                  • dick_barton
                                    Badcaps Legend
                                    • Aug 2015
                                    • 6643
                                    • Wales

                                    #18
                                    Re: insignia ns-46e340a13 standby 7 blinks - when on, text missing on menus

                                    U403 as shown. What is the discolouration on the top of the IC
                                    Attached Files
                                    Willing to help but I'm no expert.

                                    Comment

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