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Vizio L30 Power on off

I've seen a couple of other threads that are similar but with no real solutions.  I have a 2005 Vizio L30.  When it sits for awhile you can turn it on, it will stay on with picture for about 20 seconds, then it shuts off.  The blue led at the bottom turns to purple.  The purple led then continues to cycle on and off.  If you try to turn the tv on again it will not work at all.  If you let it sit again for a half our or so you can turn it back on for about 20 seconds.  Anyone have any advice?

Posted by USUBen on

  • 4 more comments 
  • USUBen Oct 19, 2007

    Thank you for that advice.  One thing I would run by you is that I took the tv apart and found that there was an IC on the power supply board with some brown discoloration around it.  I looked up the part number and it is said to be an SMPS Primary Switcher.  Does this seem probable at all as a diagnosis, what do you think?

  • USUBen Oct 22, 2007


    This is the power supply from my Vizio L30.  I called Vizio and they said that since it is out of warranty that I would have to take it to a repair shop and they wouldn't give me any advice other than that.  You can see the discoloration here in the picture on the 8-pin IC that is near the top center of the board.  Just to give you a background on myself I'm a student studying Mechanical Engineering, I have some electrical experience but not much by way of circuit board diagnosis.  I got this tv for way cheap and I'm also trying to fix it to learn a little bit more about electronics.  I'd be happy to got through and diagnose step by step, I have a good digital multimeter and some electronics soldering and desoldering tools.  I also got a can of circuit board cleaner as you recommended and I will try that first to see if it alleviates any partial shorts.  Thanks again for your advice so far.

  • USUBen Oct 23, 2007

    My tv is actually a Vizio L30 which is slightly different than the L30WGU.  For some reason vancebaldwin doesn't even have parts for my model of tv.  I got the number off of the power supply board though.  It's made by Delta Electronics and the part number is DPS-210EP A.  I was also wondering, I hear kind of a buzzing sound from the board when it is on, is that normal?  I also checked all of the output voltages and they are correct as they are specified on the board.  I tried cleaning the board thoroughly with circuit board cleaner too with no avail.  Anyway, if you can find anyone who could get me that power supply I would appreciate it.  I'm having trouble locating a place that has it.

  • USUBen Oct 31, 2007

    Hey, thanks I'll have to look into that.  I think you are right that it's best to get a donor because you never know what the root cause is for the problem.  If I have a complete set it should work.

  • USUBen Nov 07, 2007

    Just for the record I fixed the power supply board. I was able to take the part number off of the IC that is show in the picture with the burned discoloration around it. I found one on ebay for a few bucks plus shipping so I figured it was worth a try. I soldered in the new primary switcher 8-pin integrated circuit and to my amazement, it worked!!! The tv now works perfectly. I appreciate all of the advice I received on here and wish everyone else the best of luck on fixing their electronics!!!!!!

  • Anonymous Mar 20, 2014

    my television keeps shutting off, like I pulled the plug, and then when I unplug the power cord from the back of the television,and let it sit for half an hour, and plug it back in,and turn it back on it stays on.

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Anonymous

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>The SMPS stands for Surface mounted Power Switcher

I think you'll find it's Switch Mode Power Supply

Posted on Oct 28, 2007

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Greg Stokes

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HI USUBen,

 

I do not know exactly what is wrong with your TV.  I did study the manual and of course it wa no help.  I did run across the last page where it said something akin to" Our professional Technicians can probably solve your probalem over the phone and save you a bundle on Shipping". So i say to you USUBen, Give calling Vizio a chance. Heres the number.Vizio L30 Power on off - b834f77.jpg

Posted on Oct 19, 2007

  • 9 more comments 
  • Greg Stokes
    Greg Stokes Oct 19, 2007

    Ok USUBen,



     



    Yes, this is significant. It sounds like your power supply could be burned up or burning up.  This does not mean its bad.  Please give the Vizio guys a call.

  • Greg Stokes
    Greg Stokes Oct 19, 2007

    The SMPS stands for Surface mounted Power Switcher. This tells me in my mind it is not repairable as in taking out a soldering iron and Soldering in a new SMPS.  The switcher power supply get a reference signal telling it that the amps are getting to high, and the swticher will clamp and not put out any more voltage.  This is in Simplified terms.  i am not surprised to hear that the circuit board has browning around this item.  It handles all the power for your Vizio.



     If your willing, we can work through this problem systematically and analytically. Iit may take a week.though.  Hopefully you have a digital Camera, it does not have to be real good, just able to hook to internet and send pics.



    While your out in town, pick up a can of Circuit board cleaner from an electronics store. I am leaning towards something is loading up the power supply. It may not be a full short, but is enough to clamp the SMPS.  If you can pictures will help. Just Save them to your hard drive and click the icon in the post window between the world_paperclip and You Tube.  Make sure the photo is save as low quality. Less than 150 KB,. 



     



    Lets getter fixed shall we...;

  • Greg Stokes
    Greg Stokes Oct 22, 2007

    HI USUBen,



     



    This is not a surface mount circuit board. To save time and money and frustration, FInd the Board number and manufacturer.  I can see if I can find the power supply or you can either one. I would go to Partstore.com first. I can see the word Delta.

  • Greg Stokes
    Greg Stokes Oct 22, 2007

    HI USUBen,



    '



    I could not find Vizio in the partstore.com website.  I found a website that does have the parts you need.  I suggest instead of Soldering and replacing components with little chance of it being the only thing wrong, is to work at Board level troubelshooting. This may be more expensive, but your frustration level with Electronic compnent replacement will probably stress you out. Below is the URL. 



     



    https://www.vancebaldwin.com/webwiz/wwiz...

  • Greg Stokes
    Greg Stokes Oct 22, 2007

    Here is possibly you Vizio Diagram.  Let me know if it is the right model if you can.



     



    https://www.vancebaldwin.com/shop/resear...

  • Greg Stokes
    Greg Stokes Oct 28, 2007

    Hi USUben,



    I am looking for you a power supply. This part is hard to find.   

  • Greg Stokes
    Greg Stokes Oct 28, 2007

    Lesson in electronics:



    It is more efficient to  Identify  which circuit board is bad, and Replace it. If we go through this power  Supply you have,  and replace a component, what made that component go bad. We have to replace or repair it as well. Of course, if the Power supply is bad, What made it go bad. Are we going to find a DPS-210EP, then install it only to find we just destroyed it as well.  We need to be diligent here and come up with a detailed troubleshooting plan.



    I am thinking You need to check  for Grounds, on any of the wire harnessed that lead from the DPS-210EP. 

  • Greg Stokes
    Greg Stokes Oct 31, 2007

    Hi USUben,



    i have been really overloaded lately and have not been able to spend any time on Fixya.  i apologize.  I found a part source if your interested.  Its on Ebay.  This L30 will power on but the screen is damaged. This would be a good organ donor for your L30.

    http://cgi.ebay.com/Vizio-L30-30-TV-Tele...

  • Greg Stokes
    Greg Stokes Oct 31, 2007

    Hi USUben,



    I just want you to know that Ken Friedman from Vizio in Ca contacted me about your power supply with a lame comment that I could get parts from VinceBaldwin.com.  I looked at similar power supplies for like the L30wgu and it is about $300. I think that is rediculous price, but I looked at other parts. They are outrageous.  I think it may be becasue I was signed in as a guest. If you can afford it, I already see someone made an offer.  I suggest you give him and offer around 85% of his asking price at least.

  • Greg Stokes
    Greg Stokes Oct 31, 2007

    I was talking about making the guy on Ebay a substantial offer on his L30. 

  • Greg Stokes
    Greg Stokes Nov 07, 2007

    USUben , you RULE Man,

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