Vizio Powers on no pic or sound

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  • Falcons2677
    Member
    • Dec 2014
    • 19
    • USA

    #1

    Vizio Powers on no pic or sound

    Hello all,
    I have a vizio vw47LFHDTV10A the vizio logo on front turns from amber to white but no picture or sound. I am a newbie but have some knowledge. I can use a dmm and solder. Where should I start?
  • CapLeaker
    Leaking Member
    • Dec 2014
    • 7978
    • Canada

    #2
    Re: Vizio Powers on no pic or sound

    Does the menu or any OSD come up?

    Comment

    • Falcons2677
      Member
      • Dec 2014
      • 19
      • USA

      #3
      Re: Vizio Powers on no pic or sound

      nothing comes on. Since the post I pulled the back off the tv. The only dc power I have at the power supply is 5v standby no other power. I assume the power supply is bad but i would like to try and troubleshoot the problem with some help. All the caps look good no bulging or leaking that I can see.

      Comment

      • CapLeaker
        Leaking Member
        • Dec 2014
        • 7978
        • Canada

        #4
        Re: Vizio Powers on no pic or sound

        Need pix and model numbers of the power supply and the main board. Maybe another one of the power supply with the pin out for the voltages. Could be power supply, could be main board.

        Comment

        • Falcons2677
          Member
          • Dec 2014
          • 19
          • USA

          #5
          Re: Vizio Powers on no pic or sound

          the power supply # is 0500-0507-0340
          I also disconnected all dc side plugs from ps plugged in and turned power on and got the same readings 5vdc on standby and 0 on all other pins.

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: Vizio Powers on no pic or sound

            Check the DC Voltage at the PS_ON pin, it should have >2.5VDC when the VIZIO LOGO turns white.
            You must have cables back in place.
            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

            • ricosavy
              Badcaps Veteran
              • Jul 2012
              • 457
              • united states

              #7
              Re: Vizio Powers on no pic or sound

              Sometimes the inverter boards go bad on these.Here is a video that shows u what to look at. Also another that explains voltages on your tv http://youtu.be/IBRE1Dcyxp4

              http://youtu.be/jR2UZhoDC2c

              Comment

              • Falcons2677
                Member
                • Dec 2014
                • 19
                • USA

                #8
                Re: Vizio Powers on no pic or sound

                I ordered a power supply for $49. PS_ON pin was 0 with all plugs on. With any thing I tried only could get the 5v stand by but the logo would turn white. I looked at the above link on inverter boards. I could not find any dis color or sign of anything burnt. I will update when I get the power supply if it fixes the problem or not.

                Comment

                • Falcons2677
                  Member
                  • Dec 2014
                  • 19
                  • USA

                  #9
                  Re: Vizio Powers on no pic or sound

                  Power supply was not the problem. Same thing 5v stand by 0v on anything other prongs.

                  Comment

                  • budm
                    Badcaps Legend
                    • Feb 2010
                    • 40746
                    • USA

                    #10
                    Re: Vizio Powers on no pic or sound

                    Main board generates the PS_ON signal to turn the rest of the power supply, without it the TV will not function.
                    You need to check the Voltage regulator ICs on the main board next.
                    Please follow the instruction on how to test and report the readings in the format that will be easy for us to see the data of your findings.
                    https://www.badcaps.net/forum/showth...999#post300999
                    Last edited by budm; 12-31-2014, 07:30 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

                    • ricosavy
                      Badcaps Veteran
                      • Jul 2012
                      • 457
                      • united states

                      #11
                      Re: Vizio Powers on no pic or sound

                      Best thing is to follow the instructions and i know sometimes we want get thing fixed fast but i have learned here that it is a good idea to do tests and then ask if they think the part is problem before ordering.It has saved me money and has made my knowledge grow.budm has helped me a lot and so have a lot of people here.thanks everyone

                      Comment

                      • johnboy1313
                        Badcaps Legend
                        • Nov 2012
                        • 1959
                        • USA

                        #12
                        Re: Vizio Powers on no pic or sound

                        Check the caps and the fuses on the inverter boards too. I think I fixed one of these with a bad inverter.

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #13
                          Re: Vizio Powers on no pic or sound

                          http://www.shopjimmy.com/vizio-3647-...lfhdtv10a.htm#
                          If this is your board, then you need to check
                          U15, 16, 17, 19, 20, 21, 22.
                          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

                          • CapLeaker
                            Leaking Member
                            • Dec 2014
                            • 7978
                            • Canada

                            #14
                            Re: Vizio Powers on no pic or sound

                            Originally posted by Falcons2677
                            the power supply # is 0500-0507-0340
                            I also disconnected all dc side plugs from ps plugged in and turned power on and got the same readings 5vdc on standby and 0 on all other pins.
                            That's because after unplugging everything on the DC side, you didn't force on the power supply with a jumper. So all you get would be the 5V standby voltage.

                            Anyway, make sure all the voltage are there, then go check the stuff that budm suggested.

                            Comment

                            • nomoresonys
                              Badcaps Legend
                              • Jan 2013
                              • 12081
                              • U.S.

                              #15
                              Re: Vizio Powers on no pic or sound

                              Originally posted by CapLeaker
                              That's because after unplugging everything on the DC side, you didn't force on the power supply with a jumper. So all you get would be the 5V standby voltage.

                              Anyway, make sure all the voltage are there, then go check the stuff that budm suggested.
                              for sure, that jumper process can be a little hard to figure out, I don't know exactly how it works, but I'm a slow learner.

                              Comment

                              • Falcons2677
                                Member
                                • Dec 2014
                                • 19
                                • USA

                                #16
                                Re: Vizio Powers on no pic or sound

                                Main Board # 3647-0052-0150

                                U15
                                1084
                                0723GL
                                1=2.07
                                2=3.31
                                3=5.08

                                U16
                                7805CT
                                RE1651G
                                1=0
                                2=0
                                3=0

                                U17
                                AMC1117
                                F0734J
                                1=2.08
                                2=3.32
                                3=5.09

                                U19
                                1084
                                0723GL
                                1=1.25
                                2=2.49
                                3=5.11

                                U21
                                AMC1117
                                F0734J
                                1=0
                                2=1.24
                                3=2.48

                                U22
                                AMC1117
                                F0734J
                                1=2.05
                                2=3.30
                                3=5.14

                                U44
                                J303
                                G9117
                                1=0
                                2=0
                                3=0

                                I have not tried any jumpers. This is the tv powered on.

                                Comment

                                • ricosavy
                                  Badcaps Veteran
                                  • Jul 2012
                                  • 457
                                  • united states

                                  #17
                                  Re: Vizio Powers on no pic or sound

                                  Turn the tv on and get a flashlight point it at front of the screen and move it around screen and look to see if you see a image or message.

                                  Comment

                                  • Falcons2677
                                    Member
                                    • Dec 2014
                                    • 19
                                    • USA

                                    #18
                                    Re: Vizio Powers on no pic or sound

                                    Can't see a thing with the flashlight

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #19
                                      Re: Vizio Powers on no pic or sound

                                      The Voltages look OK, the U16, 44 will not be working until the 12V power supply is working.
                                      To do the force on PS_ON, you will have to first disconnect that PS_ON wire so we will not backfeed the signal back to the main board, then you will use 100~1K resistor connected between the PS_ON pin and the 5VSTBY pin to force on the power supply.
                                      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

                                      • Falcons2677
                                        Member
                                        • Dec 2014
                                        • 19
                                        • USA

                                        #20
                                        Re: Vizio Powers on no pic or sound

                                        okay, took the PS_ON wire out of the plug or out of the harness. Jumped with a resistor. The back light come on. The vizio emblem stayed amber.
                                        U16
                                        7805
                                        0723GL
                                        1=10.98
                                        2=0
                                        3=5.02

                                        U44
                                        J303
                                        G9117
                                        1=8.41
                                        2=9.66
                                        3=10.98

                                        Comment

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