help vzio turns on then off

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  • bnelson
    New Member
    • Sep 2014
    • 5
    • usa

    #1

    help vzio turns on then off

    I have a vizio tv model e420VO and the problem I am having with it is that the tv turns on and displays the vizio logo on the screen and then the tv shuts off. I have power cycled the tv plugged it into other outlets and tried different power cords. Everything seems to work fine but it shuts off after displaying the logo on the screen so I took off the back and I couldnt see any blown capacitors or burn marks. I can't afford to pay for the fix but If you can help me find the problem I am crafty at finding replacement parts cheap and I am very handy at fixing things. Also if it helps there is a vizio brand logo on the front of my tv that is orange when off and turns white when I turn it on then goes back to orange after it shuts itself off after displaying the logo. Any help is greatly appreciated.
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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: help vzio turns on then off

    https://www.badcaps.net/forum/showthread.php?t=39740
    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

    • bnelson
      New Member
      • Sep 2014
      • 5
      • usa

      #3
      Re: help vzio turns on then off

      I will try to load pictures as soon as possible I am in the process of soldering what I belive to be heat shields off of the only two boards since they cover a lot of components

      Comment

      • bnelson
        New Member
        • Sep 2014
        • 5
        • usa

        #4
        Re: help vzio turns on then off

        here are some pictures do you need me to solder off the metal shields on the board to the left if so I can and then I can post more pics also let me know if I could get any closer and where you would like closer pics. also if I uploaded the pictures wrong just say something I am new to posting in forums and would appreciate help so I don't piss off the guy who could potentially help me
        Attached Files
        Last edited by bnelson; 09-03-2014, 10:48 PM.

        Comment

        • RCA2000
          Senior Member
          • Sep 2014
          • 111
          • USA

          #5
          Re: help vzio turns on then off

          A lot of Vizio sets had a bad PROM--that would cause this. Come up to the logo--or the V symbol on--then down. Sometimes the PROM can be flashed--and that will fix the set.

          Comment

          • tibimakai
            Badcaps Legend
            • Jan 2012
            • 3680
            • USA

            #6
            Re: help vzio turns on then off

            Sounds like bad U18 EEPROM issue. They are for sale on Ebay.

            Comment

            • bnelson
              New Member
              • Sep 2014
              • 5
              • usa

              #7
              Re: help vzio turns on then off

              Thanks for the help so just buy a new u18 eeprom and replace it on the board and it will most likely fix the issue?

              Comment

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