Vizio D40-D1 Totally Dead

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  • Michale32086
    New Member
    • Nov 2011
    • 1453
    • USA
    #1

    Vizio D40-D1 Totally Dead

    Vizio, completely dead.. At plug in or power up, no POWER LED, nothing on the backlights....

    Gonna check voltages, but wanted to ask about this first.. I did check the fuse, which is good..

    In the attached pic, which (if either) is the component most likely to be bad..

    The cap or the resistor..
    Attached Files
    Last edited by Michale32086; 06-06-2018, 07:17 AM.
    Tags: None
    • Andrew F. Ali
      Badcaps Legend
      • Jan 2014
      • 2450
      • Trinidad & Tobago
      #2
      Re: Vizio D40-D1 Totally Dead

      I would check/replace them both. I give my vote to the resistor.

        Comment

        • dick_barton
          Badcaps Legend
          • Aug 2015
          • 6643
          • Wales
          #3
          Re: Vizio D40-D1 Totally Dead

          The resistor burnt out for a reason. I would check diodes and mosfets in that area. What model power supply is it?
          Willing to help but I'm no expert.

            Comment

            • Michale32086
              New Member
              • Nov 2011
              • 1453
              • USA
              #4
              Re: Vizio D40-D1 Totally Dead

              Full pic
              Attached Files

                Comment

                • Andrew F. Ali
                  Badcaps Legend
                  • Jan 2014
                  • 2450
                  • Trinidad & Tobago
                  #5
                  Re: Vizio D40-D1 Totally Dead

                  Originally posted by dick_barton
                  The resistor burnt out for a reason. I would check diodes and mosfets in that area. What model power supply is it?
                  Now that I can see the whole picture.

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA
                      #6
                      Re: Vizio D40-D1 Totally Dead

                      That is the resistor for the Source pin of the power Q8100 MOSFET that drives the primary winding of that T8100. The SMPS IC that drives the Gate of that MOSFET may be damaged when the MOSFET shorted out..
                      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

                        • Michale32086
                          New Member
                          • Nov 2011
                          • 1453
                          • USA
                          #7
                          Re: Vizio D40-D1 Totally Dead

                          Originally posted by budm
                          That is the resistor for the Source pin of the power Q8100 MOSFET that drives the primary winding of that T8100. The SMPS IC that drives the Gate of that MOSFET may be damaged when the MOSFET shorted out..
                          Thanx for the reply..

                          I went ahead and just ordered a replacement board.. Seemed to be the path of least resistance...

                            Comment

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