Question about Televison & Video
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
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
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
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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