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

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.

<p>I am here to testify this fix worked for me also. My 7 year old 42&quot; Vizio was rapidly blinking between bright and dim.</p><p>Took back cover off. Put the different screws in zip lock baggies to reduce confusion later. Don't waste time uncovering big cover in the middle like i did; it's the 2 covers on each side. noticed the caps were puffy on ends.</p><p>Radio Shack is now out of business. Got the 4 35v, 470uF Nichicons caps from Amazon ($14).</p><p>Soldered out old caps. wasn't comfortable using WD-40 either to remove flux. Mixed acetone with alcohol. used cotton swab. didn't really work, just left cotton fuzz on sticky flux.</p><p>Soldered in new caps. confirm polarity. i didn't have glue gun or silicone. the caps weigh nothing. i figure the solder will hold just fine.</p><p>Put 2 side covers and the cover back on.</p><p>It's been 6 weeks. TV is working great.</p>
<p>Thanks for the Instructable and good comments as well. Only thing I would add is that, even though you should match the same exact micro-farrad value, you can always go to a higher voltage rating on your caps as long as they physically fit on the circuit board. This voltage rating is it's maximum break-down value so a little higher will certainly not hurt and, may in fact, help. Lots of bad caps out there so spend a bit more and get them from reputable places like Jameco or digikey. Never gotten a bad or counterfit part from either one.</p>
<p>I don't know if this thread is still open, but I just removed the back of the tv and inspected the boards and I don't see any puffy caps or any obvious signs of a component frying. What next? Mine is a VIZO XVT423SV.</p><p>Thanks</p>
<p>What is the voltage rating on the replacement capacitors 470&mu;F ?</p>
<p>The voltage rating is 35v</p>
<p>I have a VIZIO M420NV and it's 'VIZIO' logo light is blinking and it's white. Display is not turning on. Not sure what happened with it.</p><p>Could it be the circuit board? I would welcome any recommendations if I should repair it or buy a new one</p>
<p>My Vizio GV47L (47 inch) TV works fine except the 2 HDMI ports no longer work. Is there a way to replace the HDMI ports?</p>
<p>My Vizio GV47L (47 inch) TV works fine except the 2 HDMI ports no longer work. Is there a way to replace the HDMI ports?</p>
<p>Nice tutorial. Takes little bit of work but definitely fixes the issue. For parts that can't be fixed, <a href="http://www.vizpartsdirect.com" rel="nofollow">www.vizpartsdirect.com</a> sells boards if you are unsure or unable to repair the TV yourself.</p>
<p>Thanks for the instructions! I just fixed my dad's 42&quot; vizio.</p>
<p>Oh yeah. THANKS!</p>
<p>I just used this on my Visio GV47L (47 inch) TV. It appears to have worked. For mine, it would flicker after being on for about 10-15 minutes. However, when I opened it up, none of the capacitors looked swelled or blown. I replaced the 2 on the master and the 2 on the slave boards and put it back together and it (so far) appears to have worked. My wife says it still make a light clicking sound when you put your ear near the TV, but that might be normal? I don't hear it.</p>
<p>Anyone have ideas on how to repair the sound on a Vizio TV? It works through the DVD player but not without. Thanks for any help!</p>
<p>GREAT instructable, I found the exact same tv while my family and myself were on our nightly walk around the neighborhood. Someone had thrown it out, right next to the recycling. I took it home and turned it on and it would nothing but flash. I tried everything that Vizio said to do( reset it) but nothing! So I searched for flashing repair and found your instructable and $6.40 later I had I perfectly good 42&quot; LCD TV. Thanks again for the great instructable!!</p>
<p>Fantastic story! I'm glad my instructable could help.</p>
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!
<p>Awesome! I'm glad it worked for you.</p>
Thanks for sharing, this exactly what I was looking for. I had similar problems with my Vizio and was thinking of hiring a <a href="http://samedayfixit.com" rel="nofollow">TV repair</a> company here in in Orlando, FL, but I guess it's not a big enough problem to do that.
I just replaced bad caps in my Samsung. I went with the same ratings but a better manufacturer. I got Nichicons.<br><br>I'm not sure if hot glue is a viable replacement for silicon. They have different heat ratings. <br><br>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.<br><br>It is great your repair worked for you though.
WD 40 is used to displace water from electrical circuits and forms a protective layer. So it is not a problem to use it. <br> <br>TIP: Use WD40 on you motorbike electrical system to protect it from water. <br> <br>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. <br> <br>Thanks for the comments. Nice to have feed back.
Nice to see whatever works.

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