Question about Vizio P50HDTV10A 50 in. Plasma HDTV

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6871QYH039A YSUS board in my Vizio p50hdtv10a makes a ringing sound when powered up momentarlly then the power supply folds up and shuts down. I'm suspecting the Ysus Board more then the p/s board your thoughts ???

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  • house10805 Jun 06, 2010

    Thanks for the help Once i have one installed I'll fwd. the results.


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Absolutely spot on. The ringing sound indicates a HV circuit problem most likely the transformer has damaged insulation and it is possible that is where the sound is coming from. You can confidently go ahead and replace the Y-sus.

Posted on Jun 06, 2010

  • house10805 Jun 06, 2010

    could this issue be caused by the panel it self ?? as it dose sound as if on of the power xistors is shorted.

  • eagle338
    eagle338 Jun 06, 2010

    No a panel problem has entirely different symptoms like flashing pixels on the screen, flickering display etc., The light at the front will still indicate that the tv is on as the self-check feature cannot detect problems with the panel. It is not the power supply either as you will hear repeated clicking and the led at the front cycles on and off and finally goes into standby.


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Loud Pop Vizio P50HDTV10A 50 in.

sounds like the power supply board..could be the system board, but sounds more like the power supply board..this unit still under warranty?

Oct 20, 2008 | Vizio P50HDTV10A 50 in. Plasma HDTV

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Hi, I came across one of your posts and had a question.  I have a p50hdtv10a, it  died, now the screen flickers and turns off. I've noticed that the led on the main board's power...

The transfformer and Transistors on the Y sus . Replace the Y sus and you should be fine. There were 4 different Ysus boards used in that model. Contacting the guys at will assure you get the correct one for your model. If you need assistance just send a email to them at

Feb 18, 2012 | Televison & Video

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Every time I start my vizio it shuts off. no picture.

Are you OK to open and work on it?

There are several possibilities and you'll need to be disconnecting and reconnecting boards to be able to detect it for sure.

Do you have a multimeter? It would come handy to be able to check for shorts.

I've serviced hundreds of those and can most certainly guide you through it, but I need to know what can I work with.

BTW you can find some related articles here:
(this is the most likely candidate for your case)
(this is the second most likely candidate for your case)
(not related to your case, but related to the YSUS board services)
(A question you are very likely to face yourself)

it is also possible that your power board may have burned - individually or as a result of a failed YSUS board; this is more rare in those TVs than the above described failures of sustain boards, but it's not not out of question and should be and will be considered.

Last but not *may* be almost anything else.

I am just telling you likelyhood based on experience servicing probably a few hundreds of those.

Hope it helps....if it does, rate it accordingly please...we enjoy positive feedback.


Sep 18, 2011 | Vizio P50HDTV10A 50 in. Plasma HDTV

1 Answer

I have VIZIO Model # VP50HDTV20A. While we were watching it shut off, then i call VIZIO about what happen, they told me to unblock the power then hold it the power switch for a min then try to block in...

Sounds like The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Jul 06, 2017 | Vizio P50HDTV10A 50 in. Plasma HDTV

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Vizio P50HDTV10A 50 in. HDTV Plasma Television The picture started flashing in and out and then the picture went black. The power light is on, has sound no picture. only 2 yrs old

I repair a tv just like yours with same problem. I replace the x and y sustains boards. If you do replace them, please make sure it is disconnected from power outlet.

Aug 26, 2010 | Vizio P50HDTV10A 50 in. Plasma HDTV

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My tv has sound but no picture

most likely it is the ysus or zsus board on the tv. But the power supply to these boards could also be the problem
do you have a voltmeter?

Aug 01, 2009 | Vizio P50HDTV10A 50 in. Plasma HDTV

1 Answer

Trys to power up makes Buzz, then nothing but light stays green.

those vizio plasma have a lot of problems, its still most likely the Ysus board, but it will have to be tested to know for sure. If you bought it at coctco you are in luck, if bought a couple of years ago they will give you a full refund. you can try replacing it yourself by checking or ebay

Jan 18, 2009 | Vizio P50HDTV10A 50 in. Plasma HDTV

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