A burnt Vizio E421VO

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  • Spork Schivago
    Badcaps Legend
    • Mar 2012
    • 4734
    • United States of America
    #1

    A burnt Vizio E421VO

    My sisters boyfriend brought me a Vizio E421VO 42" flat screen LCD HDTV today. Said it's his grandmother's and she was just watching it and it flickered and went off. So I pulled off the cover and started looking for bad caps. Couldn't find any. Then I tested the fuse and sure enough, it was blown. Then I did a physical inspection and holy crap! It looks like some MOSFETs freaking caught fire!!! When I pulled the power board, it showed black stuff on the back of the LCD screen, burn marks. It shows burned marks on the back of the board on the HOT side. It looks like one of the MOSFETs exploded a bit!

    Does anyone know what could of caused this? The traces on the underside are damaged pretty bad like. I don't think I can fix the board. My fear is if I replace the power board with a new one that's the exact same, maybe there's a design flaw some wheres and if the problem happens again, it might end up burning down the house....

    Here's some pics.
    Attached Files
    -- Law of Expanding Memory: Applications Will Also Expand Until RAM Is Full
    Tags: None
    • Spork Schivago
      Badcaps Legend
      • Mar 2012
      • 4734
      • United States of America
      #2
      Re: A burnt Vizio E421VO

      I found this power board, for the same television. But it appears to be a different design and a newer model number. Does anyone know this power board would be compatible?
      I honestly couldn't see why it wouldn't work...

      http://www.ebay.com/itm/VIZIO-MODEL-...:X:RTQ:US:1123
      -- Law of Expanding Memory: Applications Will Also Expand Until RAM Is Full

        Comment

        • stj
          Great Sage 齊天大聖
          • Dec 2009
          • 31015
          • Albion
          #3
          Re: A burnt Vizio E421VO

          clean up the soot and take some focussed pic's

          btw, if you have a toy magnifying glass - even from an x-mas cracker, hold it directly against your fone/camera and it will take good macro shots.

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA
              #4
              Re: A burnt Vizio E421VO

              Per SJ that one will work, only $25 at SJ.
              http://www.shopjimmy.com/vizio-0500-...t-inverter.htm
              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

                • Spork Schivago
                  Badcaps Legend
                  • Mar 2012
                  • 4734
                  • United States of America
                  #5
                  Re: A burnt Vizio E421VO

                  Thanks Budm! I didn't know ShopJimmy could offer compatible parts. That's a really useful feature!
                  -- Law of Expanding Memory: Applications Will Also Expand Until RAM Is Full

                    Comment

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