Vizio GV42L HDTV blows fuses won't come on

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  • gmussman
    New Member
    • Oct 2015
    • 7
    • USA
    #1

    Vizio GV42L HDTV blows fuses won't come on

    Hi,
    I've never repaired a TV before and I'm pretty new to trying to fix electronics, though I can solder into a PCB and I can use a multimeter.

    I have a Vizio GV42L HDTV -- its an LCD flat screen. Its totally dead. I took it apart and the fuse was blown, so I replaced it. I didn't see anything else obviously wrong with the power board. When I plugged it bag in, I heard a variety of snapping-popping sounds without any signs of life from the TV. Taking it apart again, the fuse is blown but again no other obvious pathology on the power board.

    I attached some pics of the power board. What should I do next to figure out what is going wrong?

    Thanks,
    Grant
    Attached Files
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    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Vizio GV42L HDTV blows fuses won't come on

      You need to start testing the power devices such as bridge rectifier, POWER MOSFETs, ETC. You have shorted out circuit some where on the board.
      I do not know how much of the component level troubleshooting you want to go, the new board is about $40.
      http://www.shopjimmy.com/vizio-0500-...wer-supply.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

        • gmussman
          New Member
          • Oct 2015
          • 7
          • USA
          #3
          Re: Vizio GV42L HDTV blows fuses won't come on

          Oh, that's a much better price than I was finding!

          If I did want to test said components, is there a thread or guide you could recommend that would explain what they look like and how to test them?

            Comment

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