Vizio vw46l weird picture

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #81
    Re: Vizio vw46l weird picture

    OK, I did not look up the spec of the MOSFET yet, but if I am correct, you should have 12V between R351 (both ends) and gnd.
    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

    • Malachi
      Badcaps Legend
      • Dec 2015
      • 1077
      • Usa

      #82
      Re: Vizio vw46l weird picture

      Originally posted by budm
      OK, I did not look up the spec of the MOSFET yet, but if I am correct, you should have 12V between R351 (both ends) and gnd.
      I have 12v on R351

      Comment

      • dick_barton
        Badcaps Legend
        • Aug 2015
        • 6642
        • Wales

        #83
        Re: Vizio vw46l weird picture

        I think you will find your manual here.

        https://www.badcaps.net/forum/showthread.php?t=54037
        Attached Files
        Last edited by dick_barton; 04-30-2016, 07:29 AM.
        Willing to help but I'm no expert.

        Comment

        • Malachi
          Badcaps Legend
          • Dec 2015
          • 1077
          • Usa

          #84
          Re: Vizio vw46l weird picture

          Originally posted by dick_barton
          I think you will find your manual here.

          https://www.badcaps.net/forum/showthread.php?t=54037
          My tv is VW46LFHDTV20A, the one listed there is VW46LFHDTV10A.
          I don't know if it makes that much difference. I looked at the trouble shooting section but didn't really see anything that applied.
          Thanks anyway.

          I'm just waiting to see if you guys recommend I order a mainboard. Found some for under $30 on eBay.
          I know that the 12v fuse so far is blown on mine. I bypassed it with the auto fuse, getting 12v on the resistor budm mentioned but nothing on the L57 jumper.

          Comment

          • dick_barton
            Badcaps Legend
            • Aug 2015
            • 6642
            • Wales

            #85
            Re: Vizio vw46l weird picture

            Hello Malachi,
            Budm was asking you to check for 12V at components R351 and L57. Does the attached picture in my earlier post ( added ) look anything like the circuit you are checking
            Willing to help but I'm no expert.

            Comment

            • dick_barton
              Badcaps Legend
              • Aug 2015
              • 6642
              • Wales

              #86
              Re: Vizio vw46l weird picture

              Do you have an IRF736 IC alongside the components you are checking?


              Edit.
              I can see that there's a U37 close to the LVDS output connector but cannot read it from your photo.
              Attached Files
              Last edited by dick_barton; 04-30-2016, 07:50 AM.
              Willing to help but I'm no expert.

              Comment

              • Malachi
                Badcaps Legend
                • Dec 2015
                • 1077
                • Usa

                #87
                Re: Vizio vw46l weird picture

                Post #57.
                U37 is 5953GM.
                I'm too ignorant to understand schematics. Lol
                Btw, I made an offer on the board on eBay as it was listed as offers accepted.
                Last edited by Malachi; 04-30-2016, 07:58 AM.

                Comment

                • dick_barton
                  Badcaps Legend
                  • Aug 2015
                  • 6642
                  • Wales

                  #88
                  Re: Vizio vw46l weird picture

                  Could you measure the voltages on pins 1 - 8 of U37 only if to satisfy my curiosity since I suspect the mosfet is blown. It also could help others at a later date who may have similar problems.
                  Willing to help but I'm no expert.

                  Comment

                  • Malachi
                    Badcaps Legend
                    • Dec 2015
                    • 1077
                    • Usa

                    #89
                    Re: Vizio vw46l weird picture

                    Ok. Will have to do when I get home. Thanks for the help.
                    Just bought aboard for $25.
                    Last edited by Malachi; 04-30-2016, 08:26 AM.

                    Comment

                    • dick_barton
                      Badcaps Legend
                      • Aug 2015
                      • 6642
                      • Wales

                      #90
                      Re: Vizio vw46l weird picture

                      Originally posted by Malachi
                      Ok. Will have to do when I get home. Thanks for the help.
                      Just bought aboard for $25.
                      Thanks and good luck.
                      Willing to help but I'm no expert.

                      Comment

                      • Malachi
                        Badcaps Legend
                        • Dec 2015
                        • 1077
                        • Usa

                        #91
                        Re: Vizio vw46l weird picture

                        If pin one is upper left with the white dot above it, it has 12 volts as do some of the other pins on the left side.
                        None of the pins on the other side have any voltage.

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #92
                          Re: Vizio vw46l weird picture

                          The MOSFET looks to be getting the input Voltage to it but it may be not getting the ON signal at the GATE pin or the MOSFET itself is bad.
                          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

                          • Malachi
                            Badcaps Legend
                            • Dec 2015
                            • 1077
                            • Usa

                            #93
                            Re: Vizio vw46l weird picture

                            Ok.

                            Comment

                            • Malachi
                              Badcaps Legend
                              • Dec 2015
                              • 1077
                              • Usa

                              #94
                              Re: Vizio vw46l weird picture

                              Got the new main board in. Same picture problem as original post. Should I just return the mainboard and be done with this TV?
                              Last edited by Malachi; 05-02-2016, 02:38 PM.

                              Comment

                              • budm
                                Badcaps Legend
                                • Feb 2010
                                • 40746
                                • USA

                                #95
                                Re: Vizio vw46l weird picture

                                Originally posted by Malachi
                                Got the new main board in. Same picture problem as original post.
                                Using the new T-CON board?
                                So right now the set is using new T-CON and new Main board.
                                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

                                • Malachi
                                  Badcaps Legend
                                  • Dec 2015
                                  • 1077
                                  • Usa

                                  #96
                                  Re: Vizio vw46l weird picture

                                  No, I sent the "new" tcon board back because the picture was worse with it than the old one.
                                  Colors are off, people, moving objects have a blur and there is still the darkness on the rights side that slowly fades away.

                                  I've looked online but can't find an firmware for it case it need reflashed.

                                  Comment

                                  • Malachi
                                    Badcaps Legend
                                    • Dec 2015
                                    • 1077
                                    • Usa

                                    #97
                                    Re: Vizio vw46l weird picture

                                    The tcon that I can find on eBay are used. They say they work but who knows.

                                    Btw, since my skills are limited to replacing caps and then swapping boards, is there any place ou know of that buys or at least pay for shipping for boards that need surface components replaced.
                                    I'm even starting to have a couple of Panasonic SC, SN and SS boards. Lol
                                    Last edited by Malachi; 05-02-2016, 02:50 PM.

                                    Comment

                                    • Mike's TV Repair
                                      New Member
                                      • May 2014
                                      • 3
                                      • United States

                                      #98
                                      Re: Vizio vw46l weird picture

                                      I got got a VW46L in today with this exact same problem. I can flex the display (screen) on this set and it makes the problem get worse and go away. This set has a bad display.

                                      Comment

                                      • Malachi
                                        Badcaps Legend
                                        • Dec 2015
                                        • 1077
                                        • Usa

                                        #99
                                        Re: Vizio vw46l weird picture

                                        That's what I figured. I had already thrown it away this morning.

                                        Comment

                                        • kingkhan
                                          New Member
                                          • Jul 2015
                                          • 5
                                          • Canada

                                          #100
                                          Re: Vizio vw46l weird picture

                                          Thankfully i found this thread before spending any money on the main or TCON boards. I have this exact same TV with the same issue.

                                          It was in server for about 8 years so i got my moneys worth out of it.

                                          Comment

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