Vizio SV320XVT Possible Inverter Problem.

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • ChaseB1989
    Member
    • Oct 2012
    • 11
    • U.S

    #1

    Vizio SV320XVT Possible Inverter Problem.

    I Have a problem with this TV .When I turn it on the vizio emblem goes from orange to white and the vizio logo comes on the screen normally then after the logo disappears the back lights shut off and the emblem stays white . I can see the picture when I shine a flashlight on it and it has sound. So I am thinking it is a backlight inverter problem. What do you guys think?
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Vizio SV320XVT Possible Inverter Problem.

    It does sound like "two seconds to black", as the TV otherwise functions normally. Do you have a DMM and camera to take pictures with?
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

    • ChaseB1989
      Member
      • Oct 2012
      • 11
      • U.S

      #3
      Re: Vizio SV320XVT Possible Inverter Problem.

      Well I have both. I do get it to work sometimes and once it's on it stays on . I don't want to open it up tonight. Right now I have it right next to my air conditioner. Could Cold temperatures effect anything?

      Comment

      • gilly1984
        Badcaps Veteran
        • Jun 2012
        • 751
        • UK

        #4
        Re: Vizio SV320XVT Possible Inverter Problem.

        Yes, temperature makes a difference sometimes.

        If once its on it stays on i would think that when warmed up it stays on.

        So check the caps on the psu, even if they look good they may be bad.

        When caps warm up they go lower in esr. Well, thets what i have learnt on here anyway
        Do NOT touch heatsinks when testing for voltages as they may be LIVE!

        Comment

        Related Topics

        Collapse

        • x_orange90_x
          Vizio E55-E1 bad backlights or bad inverter?
          by x_orange90_x
          I just got this tv today and it appeared to have no backlight on. After taking off the rear cover and checking again in the dark I can see that MAYBE one quadrant is lit.. But still it's quite dim. I was going to check the LEDs with my tester, and I found LED 1 and LED 2 + pins on the wire from the inverter, but I couldn't identify a ground. Nonetheless I tried using a mounting screw on the inverter board and also the chassis as ground but regardless my tester reads 300 which is what it reads when there is no voltage draw.

          I don't know how exactly to test the inverter itself. Is it...
          01-29-2025, 09:24 PM
        • valvashon
          Insignia NS-LCD19-09 (PS OK, Inverter problem?)
          by valvashon
          For some reason I'm just not going to let this 19" TV defeat me. I guess because I have a schematic to work from I feel like I'm oh so close.

          History- while adding a turn-on circuit I let a small screw roll under the power board. Worked through all of that circuitry, probably replacing a MOSFET and PWM controller that were not bad but I was following the service manual. Finally figured out that the power supply is in working order when the inverter section (for the backlights) is disconnected. When the +12 supply to the inverter is disconnected the +12 and +5 will come up...
          01-04-2024, 01:44 PM
        • rajbot
          No Power problem with Vizio E60-E3
          by rajbot
          Hi all:

          I have a Vizio E60-E3 I am trying to troubleshoot a no power problem with. Thanks to the help on this board and elsewhere, I was pretty sure I had narrowed it to a power board problem. The board in question is a 09-60CAP0D0-00. Image attached for reference, but not of my board (tv is put away at the moment). FWIW, no obvious looking issues with the board.

          I measured voltage at power in and on the fuse and saw 120V, so power is getting to the board.

          On the pins out to the main board, I got no voltage at all on any of the pins. I assumed this...
          03-22-2023, 08:09 AM
        • theone111
          Problem with LG Plasma 60PM6700 - Random power downs
          by theone111
          I have an LG Plasma TV 60PM6700 for the past ~12 years.

          In the last ~3-4 months I have been having some issues.
          1. Problem: It started with random picture disappearing (sound still worked).
            Frequency: Happened about once a week.
            Solution: Had to turn off TV wait a few seconds before turning it on again.
          2. Problem: Then it got worse and the TV started to shut down and when turning on the no picture just sound.
            Frequency: Happened about once a week.
            Solution: Had to turn off TV wait about 10-20 seconds and turn it on again to solve.
          3. Problem: TV shuts down
          ...
          07-22-2024, 10:36 AM
        • Zeonalbasta
          Thinkpad X1 Carbon "LMQ-1MB 12298-2 48.4LY26.021" VCC3M problem
          by Zeonalbasta
          i have a problem with thinkpad X1 carbon gen 2 "LMQ-1MB 12298-2 48.4LY26.021"
          The laptop was turned off because the MOSFET was not transmitting voltage. After checking it turned out that the gate pin on the MOSFET was the problem, because it was producing an inappropriate voltage. and it was discovered that the problem was with the Think engine, so I decided to reprint each pin, and finally the mosfet could work properly. However, there is another problem, even though the voltage has been supplied to the laptop, it still won't turn on, there isn't even an LED indicator. After double...
          09-13-2024, 01:17 PM
        • Loading...
        • No more items.
        Working...