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  • markmac3
    Member
    • Sep 2017
    • 22
    • USA

    #1

    vizio

    I have a vizio vw42LFHDTV10A that when plugged in will show amber vizio logo but will not turn on, I have replaced both the main and power boards, still the same results. I saw a burnt place on main board is the reason I replaced it thinking it was bad, then when that didn't work I replaced the power board and still the same results. I do not see any bulged capacitors on either of the "new" used boards. any help appreciated
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: vizio

    We need good clear pictures of the whole backside of the TV showing all the boards and then straight shot pictures of the top and bottom sides for power supply board and main board.
    What Voltages testing have you done before replacing the boards?
    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

    • markmac3
      Member
      • Sep 2017
      • 22
      • USA

      #3
      Re: vizio

      Here are the board's
      Attached Files

      Comment

      • markmac3
        Member
        • Sep 2017
        • 22
        • USA

        #4
        Re: vizio

        I have 5vdc on the 5v pins but no 12 v on any of the 12 v pins

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #5
          Re: vizio

          Originally posted by markmac3
          I have 5vdc on the 5v pins but no 12 v on any of the 12 v pins
          OK, you need to read this:
          https://www.badcaps.net/forum/showth...956#post305956
          So you will understand a little bit more as to why you do not have the 12V, 24V.
          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

          • markmac3
            Member
            • Sep 2017
            • 22
            • USA

            #6
            Re: vizio

            thanks budm, ok my question is this, do I need to jumper ps_on to get the 12v? and if so what pin do I jump it to?

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #7
              Re: vizio

              With all the original boards connected then you should find out if the main board is sending the PS-ON signal (>2.5VDC = ON, <1V = OFF) or not when power switch is activated, if not then you will look at the main board to find out why.
              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

              • markmac3
                Member
                • Sep 2017
                • 22
                • USA

                #8
                Re: vizio

                ok checked it and got no voltage on ps_on when pressing power button.

                Comment

                • ivtec
                  Badcaps Legend
                  • Dec 2008
                  • 1967
                  • USA

                  #9
                  Re: vizio

                  Originally posted by markmac3
                  I have a vizio vw42LFHDTV10A that when plugged in will show amber vizio logo but will not turn on, I have replaced both the main and power boards, still the same results. I saw a burnt place on main board is the reason I replaced it thinking it was bad, then when that didn't work I replaced the power board and still the same results. I do not see any bulged capacitors on either of the "new" used boards. any help appreciated
                  markmac3; If you replaced power supply and Main board and still no pic,you may try to replace the inverter boards,also could be any of the boards you replaced could be faulty too.

                  Comment

                  • markmac3
                    Member
                    • Sep 2017
                    • 22
                    • USA

                    #10
                    Re: vizio

                    I am hoping it's not inverter, but if it is they are only$20. If I would like to figure out which one it is, hopefully budm will chime in with more troubleshooting tips. I got 2 mains and 2 power boards, plenty of spare parts.lol

                    Comment

                    • ivtec
                      Badcaps Legend
                      • Dec 2008
                      • 1967
                      • USA

                      #11
                      Re: vizio

                      Originally posted by markmac3
                      I am hoping it's not inverter, but if it is they are only$20. If I would like to figure out which one it is, hopefully budm will chime in with more troubleshooting tips. I got 2 mains and 2 power boards, plenty of spare parts.lol
                      Well; it could be also T- con board,or just the T- con board SM fuse ,but the best way to be helped by the Experts like Budm and others here is to follow their instructions to the teeth,here is the service manual.I also have same Vizio model that i fixed by replacing the 2 Caps on the Inverter board,but my issue was different tv would power up but acted strange,
                      I've also fixed another vizio different model that had same issue as yours and it was a adjustably 1117 regulator on the main board,you should type vizio ; your model# on this Forum Bad Caps Search on top and there are many issues similar to yours,i'm no expert like most of the guys here but I've repaired a few TVs here with the help of these outstanding folks here but you have to know some thing in order to understand instructions,other than that you are left with changing boards which is very expensive and it's not worth it,some times a simple transistor ,caps,or resistors or other cheap part is all it takes, that costs just a few bucks and you are ordering boards at will for nothing.if you need anything just ask,good luck.


                      https://www.manualslib.com/manual/72...?page=4#manual
                      Last edited by ivtec; 09-06-2017, 03:15 PM.

                      Comment

                      • markmac3
                        Member
                        • Sep 2017
                        • 22
                        • USA

                        #12
                        Re: vizio

                        Thanks for the input ivtec! I like messing around with electronics, not schooled in it or anything, just like learning. I hope I didn't buy some bad boards, company I got them from, tvpartsguy, seem legit. I'm only seeing 3 boards on the back of tv, power, main and what I thought was inverter, at top of panel. Where is Tcon board?

                        Comment

                        • ivtec
                          Badcaps Legend
                          • Dec 2008
                          • 1967
                          • USA

                          #13
                          Re: vizio

                          Originally posted by markmac3
                          Thanks for the input ivtec! I like messing around with electronics, not schooled in it or anything, just like learning. I hope I didn't buy some bad boards, company I got them from, tvpartsguy, seem legit. I'm only seeing 3 boards on the back of tv, power, main and what I thought was


                          inverter, at top of panel. Where is Tcon board?


                          check theses pic;
                          Pic 1 Inverter board Slave
                          2 inverter board Master
                          3 Main Board
                          4,5,6,7,8, Power Boards

                          if you want me to tell you which is the T-con board and other boards just send me a pic Attach. of the hole back of the tv with the back off.



                          https://www.badcaps.net/forum/showth...ght=vizio+gv42
                          Last edited by ivtec; 09-06-2017, 04:38 PM.

                          Comment

                          • markmac3
                            Member
                            • Sep 2017
                            • 22
                            • USA

                            #14
                            Re: vizio

                            Here's pic ivtec
                            Attached Files

                            Comment

                            • markmac3
                              Member
                              • Sep 2017
                              • 22
                              • USA

                              #15
                              Re: vizio

                              also just checked power going to what I think is inverter board(smallest board) and getting 12vdc from pins 7 and 8. so it looks like im getting voltage to inverter, this is from the main board, checked fuse on inverter board also and it is good......ok im a dumbass. I had meter set on reading capacitors. no voltage going to inverter on any pins.
                              Last edited by markmac3; 09-06-2017, 05:43 PM. Reason: because im a dumbass

                              Comment

                              • budm
                                Badcaps Legend
                                • Feb 2010
                                • 40746
                                • USA

                                #16
                                Re: vizio

                                https://www.badcaps.net/forum/attach...0&d=1504739218
                                the big green board is the main board, the yellow/brown board to the right of the main board is the power supply-inverter combo board, the small green board to the right of the power supply-inverter board is the T-CON board.
                                The small green board on the bottom left is sub-input board. There should be another mall board where the power switch is located, we need to verify t hat the power switch is sending the signal to the main board or not, if it does not then there will be no PS-ON to be sent to the power supply-inverter 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

                                • markmac3
                                  Member
                                  • Sep 2017
                                  • 22
                                  • USA

                                  #17
                                  Re: vizio

                                  I'm getting 3.3 vdc to power switch but not on ps_on while pressing power button. On the power supply/ inverter I get 4.9 vdc on all 5vdc pins but nothing anywhere else. Pic is the power supply pins, I unplugged it so you could see
                                  Attached Files
                                  Last edited by markmac3; 09-07-2017, 04:17 AM.

                                  Comment

                                  • ivtec
                                    Badcaps Legend
                                    • Dec 2008
                                    • 1967
                                    • USA

                                    #18
                                    Re: vizio

                                    Originally posted by markmac3
                                    Here's pic ivtec
                                    Marked T-con with a red circle and T-con board fuse check it if you have 12v both sides , i think.
                                    Attached Files

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #19
                                      Re: vizio

                                      Originally posted by ivtec
                                      Marked T-con with a red circle and T-con board fuse check it if you have 12v both sides , i think.
                                      Right now Op has no PS-ON so there will be no 12V to test.
                                      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

                                      • markmac3
                                        Member
                                        • Sep 2017
                                        • 22
                                        • USA

                                        #20
                                        Re: vizio

                                        Originally posted by ivtec
                                        Marked T-con with a red circle and T-con board fuse check it if you have 12v both sides , i think.
                                        i checked the fuse and it is good

                                        Comment

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