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Our new Vizio DTV turns itself off after 20 minutes. We've tried all the solutions listed for 32

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check its power supply regulator board for any loose soldering points. Take it out, and inspect all the soldering points. It is a commom fault to all TV sets' power supply baord, that some solder points may get loosed. Most of the components on power regulator board will heat up while sorking. Repeated heating and colling may make solder terminals of the heating components to get loose contacted.
Resolder all the suspected solder points by applying a little more solder without make any solder bridge short in between adjecent solder terminals. If this do not help you, replace the board as card basis.
You haven't given the model number of your Vizio TV here. If so, I might post a picture of the power regulator board of your Tv. OK.

Posted on Feb 25, 2012


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Posted on Jan 02, 2017

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SOURCE: 32 Vizio

I'm not sure: on the Y-sus board there are 3 small power supplies. ( 3 small transformers standing together. They supply 15 volts each.) One of them supplies the 15 volts for the z-sus board this one might be defective. Replace the Elco's on this one by ordenary elco's (low -ones) in stead of the smd- elco's .

This might solve the problem. On the other hand you should realy measure this one out...

Posted on Jul 07, 2009

  • 131 Answers

SOURCE: 32" vizio won't turn on

Hello; I am John at J D Electronics in Poland, Maine. I have now repaired 81 of this same model in my shop or PCB mail in's. The set may be dead always or work intermittently. There are 2 versions of this piece of junk, but I have only seen this one. They all have 2 to 7 capacitors that fail on the power supply board that are just above that red chopper transformer. The are labeled C233 and C234 and others. These first 2 are 3300 ufd at 10 volts and 105 C temp rating. You can buy these for about $1 each from Digi-Key Electronics plus $12 shipping. There are some cautions worth mentioning. Make sure the set has been unplugged for a day or more before starting the disassembling. It is VERY important to keep the set face down on a soft surface when doing ANY work on the set. This crappy designed set has a glass faceplate that will fall down if you don't have it face down when all the back screws are removed and it is very hard to put it back into position if it falls. The bottom plastic speaker strip has a million screws to remove both from the bottom edge. Then take out all the screws for the metal back and unplug the speakers. The connector wires to the speakers will not just pull off without you pressing on a side release pin for each of the 4 wire- Stupid design again!. If you are not able to solder or test these caps , you can send the board to me with $46.00 to replace and/or test up to 7 caps this includes USPS Parcel Post return shipping. I accept only cash or USA postal MO. There is NO Warranty on this repair. It is a better than 80% chance this will fix your set. You must call me first at 207 998 5687 EST 9-5 only. Good Luck! John

Posted on Sep 13, 2011

  • 17129 Answers

SOURCE: hi my 32" toshiba Tv turns itself off after 2 - 20

The best way to check for loose connections is to tap lightly when the set is powered on, if there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, and use a good soldering iron to solder all suspected points. Sometimes the fault occurs when the set warms up; if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, solution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault. It can also be related to WEAK ELECTROLYTIC capacitors

Posted on Oct 11, 2011

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Vizio 32 Inch, turn on completely fine for about 20-30 minutes. Then sound goes out accompanied by high pitch noise and picture has varying lines or colors through it. Won't power off, have to un

Are you a decent do it yourselfer? It sounds like it is the capacitors. What happens is they get hot and expand (the top of the Capacitor). The top will be dome shaped and it will look like the top is splitting open. You can buy (about $1.50 ea.) the capacitors at your local electronics store (not Radio Shack they usually don't have a high enough amp).
You will need to take the back off and look at all of the capacitors to see which ones are bad. Usually it will be 2 or 3 of the larger ones but there could be more. Next you will need a soldering iron with a fine tip and some wicking material. How could are you at soldering and de-soldering? before I go on.
If you let me know the model # of your set I can be a little more detailed also.

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Most likely the TV has a power supply related problem. It's possible that it maybe a bad capacitor or transformer on the power supply board. Or, something simple like a blown fuse inside the TV. But, I can't say it's 100% the problem because I can't actually look at the tv over the internet. I can only make guesses with the symptom.

You have a few choices:

1. You can try leaving the TV unplugged for 30 - 45 minutes so the TV can discharge and reset itself.
2. If by chance the TV is still under warranty, go that route.

3. If you have some electronic experience, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists.Usually, cost under $20. And most cases the new part cost less than $15.

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Try leaving the TV unpugged for 30 minutes so the TV can reset itself.
If that doesn't work, most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
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I hope I shed some light on the subject for you.

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