Question about Vizio VF550XVT 55 in. LCD TV

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My Vizio VF550XVT1A works fine for 30 minutes, then the screen goes black but the sound still works. This happens again and again. How can I fix it?

I have replaced the two boards already.

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  • Alfred Grace Feb 17, 2012

    By boards I am referring to the master and inverter

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 7 Answers

SOURCE: Picture goes black, but audio stays on ????

Thanks I'll Try Calling, Offer not bad at all

Posted on Jan 04, 2008

  • 1 Answer

SOURCE: Picture goes black, but audio stays on ????

Well i have the same tv , and when i took it apart i switched a few wires around and i managed to get it working again, i can send some pictures of what i did because, i really had no clue what i exactly did by switching the wires.

Posted on Jul 26, 2008

freetek
  • 5568 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

  • 155 Answers

SOURCE: Vizio 42", have picture for about 5 mins then screen goes black.

also check the power cord wire coming from the back of the tv is loose from the tv side or perfect.

Posted on Oct 26, 2008

jscruggs420
  • 36 Answers

SOURCE: VIZIO BLACK SCREEN

That problem is the Ysus board, Sometimes people will replace the Zboard at the same time. If you bought it at costco a couple of years ago you are in luck costco will refund your purchase price, costco has changed the return policy and newer tv's are not refunded, but something to look into

Posted on Jan 17, 2009

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I have a Vizio VF550XVT1A. First problem was a flickering screen that ended with the TV turning off. I replaced both invertor boards and the TV seemed to work fine for a few weeks. Now the TV works fine...


Good day sir Alfred!!!!

If your screen turns to back after a minutes but the sounds is normal..That problem is very common to all flat panel specially to LCD TV..

OK,I need to know first if your TV having a back-light when the picture went out after a minutes.If that so the possible problem is T-CON board (this board is the responsible to produce a video on all LCD TV)..

If you don't have back-light the problem is inverter board again..But before you order or install new inverter board try to find why the inverter board gone only on few weeks after you install it..the possible problem why the inverter board faulty for the short period of time is higher/lower input voltages (24vdc) comes from power supply..try to check it using volt meter or multimeter tester..it should be read 24vdc on meter..let me know if the voltage drop or higher to 24..

If the 24vdc is fine the only problem is the condition of inverter board maybe its used or partially faulty when you buy it..

if you have more queries and clarification regarding my solution please feel free to reply on this tread...

Hope it helps..

Thanks for using fixya..

Feb 18, 2012 | Vizio Televison & Video

1 Answer

I have a Vizio VF550XVT1A. The screen started to


Hi Alfred Grace,

First of all, thank you for posting your question here at Fixya.

Based on the symptoms you've described, I don't believe that the backlights are already faulty. If backlights gone to malfunction, that are permanent, but in your case you've said that the TV power up fine for half an hour, this is an indication that the fault not came from the backlights but from the inverter boards. Inverter boards are the one giving high voltage to the backlight to light up, it has a built in protection circuit that will activate once there's a malfunction on the board to avoid further damaged because of high voltage output.
If you would like to fix it yourself, I would advice you to replace both the slave and master inverter board. I saw your board at shopjimmy.com. Click it HERE for the replacement. Replacing these boards are not technical, all you have to do is to unplug the unit overnight to drain any voltages from the power supply board, disconnect all connectors and then put-in the new boards. No soldering required. If just in case that the inverter boards are not the issue (I'm pretty confident that the power supply board is working fine), don't worry, the link I've provided accepted return, the fault is on the power supply board.

Hope I helped you.
Have a nice day!
Good luck and take care!

Jdvillanueva

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