Vizio most of the time turns on with black screen no backlight

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  • Billium28
    Member
    • Jul 2014
    • 12
    • Usa
    #1

    Vizio most of the time turns on with black screen no backlight

    My Vizio (SV42 inch panel no. LC420wuf) most of the time turns on with black screen no back light. The amber Vizio turns white but then nothing. I will unplug and plug in and try again 2-10 times until the full tv turns on.

    It seems pretty common as far as Vizio goes on here so I was looking for a bit of help. Unfortunately for my specific model I can't find a diagram on here but for a similar Vizio.

    I HAVE purchase the U33 resistor I have seen mentioned. I opened up the TV to find it was not laid out the same so I am turning to you now.

    I do own a multimeter and soldering gun but I am not a genius when it comes to electronic theory.

    Thank you.
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    • selldoor
      Slow Learner
      • Dec 2010
      • 7870
      #2
      Re: Vizio most of the time turns on with black screen no backlight

      U33 is unlikely to be a resistor - what experience of electronic repairs do you have?
      Please upload pictures using attachment function when ask for help on the repair
      http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • Billium28
          Member
          • Jul 2014
          • 12
          • Usa
          #3
          Re: Vizio most of the time turns on with black screen no backlight

          Ah I'm sorry I meant regulator but typed resistor. I don't have a lot of experience but I am pretty handy.

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA
              #4
              Re: Vizio most of the time turns on with black screen no backlight

              What is the full model number of this TV so I can see if SJ has good clear pictures of your 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

                • Billium28
                  Member
                  • Jul 2014
                  • 12
                  • Usa
                  #5
                  Re: Vizio most of the time turns on with black screen no backlight

                  I am very sorry. I am very busy lately so I haven't been able to update this ofetn. I am off the next few days with free time! My TV now won't seem to turn on so I will be extra attentive to this board. I have attached the back label to this post, (I assume it will show up here.)
                  Attached Files

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                    • Billium28
                      Member
                      • Jul 2014
                      • 12
                      • Usa
                      #6
                      Re: Vizio most of the time turns on with black screen no backlight

                      Bump

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