Vizio Plasma 50HDTV10a problem

[runyonwc]

Hello,

I'm trying to fix my plasma tv that has a white vertical column in the center of the screen. The rest of the screen is black but I do have sound. Does any one have any experience with this or have any idea what it could be?


Thanks!

Walter Runyon

[tom66]

Re: Vizio Plasma 50HDTV10a problem

I have heard this may be caused by a failed Y buffer but to me it would seem more like control board or X buffer. You would do well by taking the back off your TV and photographing it so tests can be indicated.

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

I tried the other night to desolder one of the chips on the ysus board to see if it was burnt on the bottom but I wound up breaking it. So it definately needs a new ysus board. The ysus wouldn't cause this would it? I unplugged the zsus and the screen got dimmer so that seems to be working. I also did not find any bulged caps on the Zsus or Ysus, nor did I find any blown caps.

Should I still take a picture with the back off with no YSUS board?

[tom66]

Re: Vizio Plasma 50HDTV10a problem

I tried the other night to desolder one of the chips on the ysus board to see if it was burnt on the bottom but I wound up breaking it. So it definately needs a new ysus board. The ysus wouldn't cause this would it? I unplugged the zsus and the screen got dimmer so that seems to be working. I also did not find any bulged caps on the Zsus or Ysus, nor did I find any blown caps.

Should I still take a picture with the back off with no YSUS board?

What chip did you desolder from the Ysus board?!

You may as well replace the Ysus board, I'd be 98% confident (**made up figure) that it's not causing this problem.

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

I tried to desolder one of the big chips with the heat sink on it.....so would you still like me to take a picture of the back of the tv or will it tell you nothing without a working ysus board?

[tom66]

Re: Vizio Plasma 50HDTV10a problem

I tried to desolder one of the big chips with the heat sink on it.....so would you still like me to take a picture of the back of the tv or will it tell you nothing without a working ysus board?

Can you post a picture of the board you desoldered / attempted to desolder the chip from?

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

[rpgruss]

Re: Vizio Plasma 50HDTV10a problem

Per http://blog.coppelltvrepair.com/2010...-lines-in.html, you likely need a new buffer board. Unfortunately, that y-sustain is very expensive, if you can find one. Maybe you can find a new IPM chip to repair it. If I see anything I'll post it up here.

[rpgruss]

Re: Vizio Plasma 50HDTV10a problem

I spoke too soon. Assuming you have a 6871QYH039 A/B/C board, which it looks like but I can't make out from the picture, you need this chip: http://www.ebay.com/itm/Sanyo-Module...1#ht_500wt_969

39.85 plus shipping if you are in the US.

[PlainBill]

Re: Vizio Plasma 50HDTV10a problem

To me this is a problem with either the X-Main or the Logic Main boards. The Y-Main addresses the rows, the X-Main addresses the columns. I don't think it is the main (signal) board. runyonwc, does the color and intensity of the central bar change if you change signal sources?

PlainBill

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

The screen does not change if I change signal sources. Do you think this TV is worth repairing? Right now it seems I will have to replace 3 boards (YSUS, Main, and X-board)

[tom66]

Re: Vizio Plasma 50HDTV10a problem

The screen does not change if I change signal sources. Do you think this TV is worth repairing? Right now it seems I will have to replace 3 boards (YSUS, Main, and X-board)

A new 50" plasma is around $600, the parts will probably cost $150 total, do the math.

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

I didn't realize the parts would be that affordable!

[tom66]

Re: Vizio Plasma 50HDTV10a problem

I didn't realize the parts would be that affordable!

The main logic is most likely the cause of this problem. You'll also need a new IPM or a new Y-sustain. Fix the Y-sustain first, before attempting to diagnose the main fault. The Y-sustain is unlikely to be the cause of the problem you are seeing.

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

Tom, did you read the link to coppell tv blog? It mentions the problem being the Y buffers, what do you think about that? Possible?

[tom66]

Re: Vizio Plasma 50HDTV10a problem

Tom, did you read the link to coppell tv blog? It mentions the problem being the Y buffers, what do you think about that? Possible?

That's what I initially thought, because I'd heard it before. But it seems very strange for a Y-buffer failure.

Does this TV have two Y-buffers, or just one?

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

It has two. I guess it couldn't hurt to do the resistance tests mentioned in the blog??

[tom66]

Re: Vizio Plasma 50HDTV10a problem

It has two. I guess it couldn't hurt to do the resistance tests mentioned in the blog??

Well, when you replace or repair the Y-sustain, try running it with just one and see if you get half a picture back.

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

Will do!

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

So I put in a new buffer board and used ysus. The lines in the middle are gone now but I hear a clicking coming from the ysus and the screen kinda flashes on and off with the clicking.

Any ideas?