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Have picture and sound then picture starts blacking out but still has sound . Have a Vizio E552VL model When turning on hooked to my cable everything works for a few minites picture and sound then the picture flickers and goes away there is some elumination to the picture but never comes back still has Ssound . Power board ? Led board? Which one should I replace? Have the back off no visible damage that is obvious to the boards . When left pluged in and then turned on vizio logo would freeze when turned on and I would have to do a hard reset . Unpluging and holding on button for 30 seconds and pluging in again That would allowit to get past the frozen Vizio logo and allow the picture to come on full function great picture . After a 5 or 10 minute time frame sometimes longer maybe 30 minites picture would start fading out with horizontal interuption then go black with sound still on . Have a new power board ordered . Any advise appreciated. Thanks

Posted by jerome kozlowski on

  • jerome kozlowski
    jerome kozlowski Jul 25, 2020

    Replaced power supply board . Still doing the same thing . After turning on and 10 mins or less of viewing picture starts getting horizontal lines and then fades out to no picture but sound is fine .

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5 Related Answers

freetek

Steve Allison

  • 5569 Answers

SOURCE: Screen powers off and power indicator goes out after ~30 minutes

Your message is pretty old but I'll give you my un-copywrited spiel anyhow;
If it just fails to turn on, the main power supply is probably at fault and without some technical background and a couple of test instruments, you will not be able to do the repair yourself. 
What you can do though is; unplug the set, let it stand overnight or at least several hours, remove the back panel and look for a separate board with mostly larger components on it; it will have a ferrite core transformer on it and several larger capacitors which are cylindrical and mounted vertically to the board.

 
Before touching anything inside, especially on that board, allow several hours to be safe since the larger capacitors can hold a painful voltage charge for some hours.  
 
If you see signs of overheating such as discoloration of the board material, it may not be repairable but if you can find a part number on the board, you might be able to buy the power supply and install it yourself.
If there are no signs of heat damage to the board, there may be companies offering to repair it as a subassembly instead of repairing the whole set which could be much more expensive.
If you choose to replace or have it done, the power supply still may not be at fault since most are capable of switching on and off if a downstream problem is causing an overload. 

Posted on Oct 25, 2008

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deltonsmith9

Delton Smith

  • 96 Answers

SOURCE: Vizio 32" Froze, then no more picture or sound

how long did you leave it unpluged

Posted on Jun 04, 2012

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Derrick Gee

  • 3 Answers

SOURCE: Vizio E550i-b2 TV has no backlight, pic or sound. Replaced power and Main boards - still having the problem. Any suggestions? I have the TCON and LED Driver board left

The led is what makes the picture try replacing that it it's the only one you didn't change out

Posted on Aug 31, 2016

Lawrence Oravetz

  • 10548 Answers

SOURCE: Power Shutting Off on Vizio D50U-D1

Start with the power supply board first. That usually fixes the problem. No need tor the T-con board.

Posted on Aug 09, 2017

Larry

  • 2800 Answers

SOURCE: vizio e500ib1 50"smart tv power on light then that goes out. has 5volt stand by only, there are voltage that come up but fade out. screen is black no sound. was working great perfect picture,

Do you have voltage (3.5V) on the PSON terminal when you push the start button on the TV...if you don't its the main board that has failed

Posted on Feb 09, 2018

Testimonial: "I have 3.5 volts and 5 volts nothing else."

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