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So my Vizio TV was flashing on & off rapidly every time I switched it on. I would have to give it a smack at the back to get it to stop. I know it's not a good way to get something to work, but it got things working until I had time to repair it. After some Goggleing it was clear it was most probley some capacitor that where damaged. After opening it i found 4 caps on 2 of the circuit boards blown. I replaced them and now it works great. 

1. VIZIO Model  VW42L  HDTV10A
2. Replacment capacitors 470μF
 
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Step 1: Finding the Problem

1.  The first step was to find a safe place to work on the TV. I put a moving blanket on our dinning table and put the TV face down on that.

2.  Next I unscrewed all the screw that i could find and removed the stand and back cover.

3.  I inspected all the capacitors and found 4 of them were damaged on 2 of the circuit boards on the left and right of the set.  You can easily see when they are damaged when the ends are bulged out and/or split open.

4. I unplugged, removed, repaired and replaced one board at a time.

jujypooge2 months ago
i had this TV sitting around for a couple of years after the flicker/blank screen. I found this posting and everything worked out perfect. Now I have a new TV!
MartinMakes (author)  jujypooge2 months ago

Awesome! I'm glad it worked for you.

pfred22 years ago
I just replaced bad caps in my Samsung. I went with the same ratings but a better manufacturer. I got Nichicons.

I'm not sure if hot glue is a viable replacement for silicon. They have different heat ratings.

I'm also not too keen on the idea of using WD-40 as a flux remover. WD-40 is designed to lay around for a bit, not evaporate too quickly. WD-40 is essentially aerosol oil. Rubbing alcohol is a more generally accepted flux removing solvent. It is the main ingredient of my actual flux remover. A bit of nail polish remover (acetone) with it and you're good to go there.

It is great your repair worked for you though.
MartinMakes (author)  pfred21 year ago
WD 40 is used to displace water from electrical circuits and forms a protective layer. So it is not a problem to use it.

TIP: Use WD40 on you motorbike electrical system to protect it from water.

The hot glue I use has a melting point of about 180 C. The reason I use it is that it sets fast. I also use it to seal outdoor electrics like seasonal lighting ( Halloween and Christmas ) good to insulate and waterproof.

Thanks for the comments. Nice to have feed back.
Nice to see whatever works.
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