Vizio GV47LFHDTV10A No Picture No Sound Fix

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #61
    Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

    Originally posted by bleed4me
    As soon as I get home I can get that for you... This wouldn't be about amp rating on that ic would it?
    No, I just want to make sure it is not heavy load on the output pin is causing low output Voltage.
    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

    • bleed4me
      Senior Member
      • Nov 2015
      • 122
      • USA

      #62
      Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

      Just checked the resistance, 90.2

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #63
        Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

        OK, that is fine, nothing <10 Ohms range.
        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

        • bleed4me
          Senior Member
          • Nov 2015
          • 122
          • USA

          #64
          Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

          Well parts came in and just finished installing those lil guys. TV powers on as it should with backlight and will now turn off without having to unplug it. I am not sure what is going on with the hdmi ports, plugged in a chromecast and I get nothing on either port. Could it be a setting or are those hdmi ports toast? I did try a dvd player hooked up via rca cables and the picture looks great. The speakers are not plugged in and I wouldnt imagine that interfering with the hdmi ports or am I wrong?
          Last edited by bleed4me; 02-09-2016, 12:40 AM.

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #65
            Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

            So I am curious about the DCV readings now on those two new ICs.
            So do you know the history of this TV? It might have been hit by the surge which usually also come through the HDMI ports.
            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

            • bleed4me
              Senior Member
              • Nov 2015
              • 122
              • USA

              #66
              Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

              I never get a straight answer to the tvs story when I pick them up. I mostly just get "oh it just stopped working". This TV was no different so sadly I have no story to tell. So if it was a surge does it typically ruin the HDMI port itself or is it the board that faults out? As soon as I get home I will most definitely get you the voltage readings.

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #67
                Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

                You can check and see if the HDMI chips get the Voltage to them or look for damaged chips.
                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

                • bleed4me
                  Senior Member
                  • Nov 2015
                  • 122
                  • USA

                  #68
                  Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

                  Well budm you were right they are tricky to solder. Got the voltage readings like you asked and it appears I need to revisit DU4

                  DU4
                  pin 1-0
                  pin 2-0
                  pin3 - 3.32

                  U5
                  pin 1-.71
                  pin 2- 1.97
                  pin 3- 3.33

                  You think that could be the cause of the hdmi issue?

                  Comment

                  • bleed4me
                    Senior Member
                    • Nov 2015
                    • 122
                    • USA

                    #69
                    Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

                    After revisiting DU4 TV now FULLY works as it should. HDMI all work as they should now, new voltages

                    DU4
                    pin 1- 0
                    pin 2-1.25
                    pin 3- 3.3

                    Just want to say a huge thanks to all that chimed in expecially nicktv and budm, couldnt have done it without you. Your knowledge and patience is much appreciated. Learned a great deal with this tv and I have you guys and this forum to thank for that.

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #70
                      Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

                      Glad to hear that the TV is working.
                      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

                      • Nick's Tvs
                        Badcaps Veteran
                        • Jan 2014
                        • 621
                        • USA

                        #71
                        Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

                        Bleed4me,
                        Don't thank me, I only gave you basic info at first. All that more technical advice was from budm.
                        I am glad to hear that you got the set fixed and working however!

                        Comment

                        • Electronic Handyman
                          Senior Member
                          • Apr 2016
                          • 58
                          • Canada

                          #72
                          Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

                          I have the same model GV47LFHDTV10A that has a damaged main board.Anybody have the actual schematic for it?I can only find trouble shooting charts for and I need a true schematic that shows me what parts connect to what.Also if you've the schematic for the audio board and anything else it would be much appreciated.I've had the set sitting in storage so I can give the actual board part numbers but I'd love to fix it.Thank you in advance

                          Comment

                          • Miragui
                            Member
                            • Sep 2016
                            • 14
                            • Venezuela

                            #73
                            Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

                            Hi I just registered to thank the members in this thread.

                            It helped me fix my TV, it had the same symptoms no picture an no sound, checked all the voltage regulators and fuses and U4 was bust. Luckily I could source one from and old Xbox360 DVD drive PCB I had laying around.

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA

                              #74
                              Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

                              Thanks for the report on what you found 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

                              • Maverick67
                                New Member
                                • Mar 2018
                                • 1
                                • USA

                                #75
                                Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

                                Hey I just found this same TV. Someone had put it curbside and I figured why not take a look. Found this thread and dug around. Yup Blown fuse. Up and running now. Thanks for the help.

                                Comment

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