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Vizio GV42LHDTV10A - Stays on 10 seconds - then shuts off

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    #1

    Vizio GV42LHDTV10A - Stays on 10 seconds - then shuts off

    Upon plug in, the backlight will stay on 5-7 seconds then go out along with the TV going back to standby 3 seconds later.
    The TV came on with the blue screen with "No Signal" Text floating.

    I have detached inverters and TCON and problem still persists.

    The main had one bad regulator (DU4) which was an adjustable but with that replaced the problem is still here.

    Anything else to look for on these mains?
    Vizio's guide for DC-DC converters just checked U1 (Dual FET) pin 1, 3, 5, 6, 7, 8 had 5.162v on them (good?) and then checked the regs.
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    #2
    Re: Vizio GV42LHDTV10A - Stays on 10 seconds - then shuts off

    Did you remove a heatsink?

    Comment

      #3
      Re: Vizio GV42LHDTV10A - Stays on 10 seconds - then shuts off

      There is a clip for what I presume to be the audio driver that is removed, but that is it.

      Comment

        #4
        Re: Vizio GV42LHDTV10A - Stays on 10 seconds - then shuts off

        What made you think that the regulator was bad?

        What voltages were you seeing on all of the regulators?
        The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

        Comment

          #5
          Re: Vizio GV42LHDTV10A - Stays on 10 seconds - then shuts off

          Was it in the PC VGA input mode? Does it do that if you use Video source input mode?
          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

            #6
            Re: Vizio GV42LHDTV10A - Stays on 10 seconds - then shuts off

            The regulator was under the 1.25 difference, that is why it was replaced.

            And it is (budm), it is now on another input and is currently on as I type.
            Is that an actual setting or a fault with that input?

            Comment

              #7
              Re: Vizio GV42LHDTV10A - Stays on 10 seconds - then shuts off

              That is normal, it is just like computer monitor that will go in to standby mode if it does not detect video signal from PC, and if you leave the TV in tuner mode but do not have antenna or cable attach, it will also go into standby mode after 10 seconds to minutes, most TVs are setup that way now.
              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

                #8
                Re: Vizio GV42LHDTV10A - Stays on 10 seconds - then shuts off

                Oh, well I am familiar with the auto-off features but I have never had one do it that fast lol.
                I'll consider it lesson learned.

                Comment

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