Vizio Plasma 50HDTV10a problem

[Rustyhage]

Re: Vizio Plasma 50HDTV10a problem

So is it fixed? I have the same tv, no pic just sound, with the clicking coming from the ysus board. How do you know you need a y buffer? I was hoping to fix by only replacing the ysus.

Thanks,
Russ

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

You were right, I didn't have the LVDS connector seated all the way on the main board!
I just need a top Y-buffer now


Thanks!

[tom66]

Re: Vizio Plasma 50HDTV10a problem

Ok. I purchased a brand new Ysus board today and installed it. The screen works but I get no picture, menu, or volume bar displayed on the screen. Is this caused by a main board?

Most likely you forgot to connect something. I am guessing you mean the screen glows but you get no image data. Check the Va power connector for the X buffer is plugged in - this is the little cable going from either Y-sus to X board or Z-sus to X board (sometimes both.) Also, check that the data cable going to the Y-sus is properly seated. And the LVDS connector - from the main board to the control board - check that.

Do you get sound, at all?

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

Ok. I purchased a brand new Ysus board today and installed it. The screen works but I get no picture, menu, or volume bar displayed on the screen. Is this caused by a main board?

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

The clicking is fairly frequent, about once or twice a second. I'll try to clean it...

[tom66]

Re: Vizio Plasma 50HDTV10a problem

I've unplugged both buffers but the clicking remains. The top IPM chip on the "used" Y-Sus board does not warm up like the other one. It sounds like the clicking is coming from that chip also.

And I'm guessing the clicking goes if you unplug the Y-sus?

How long between each click?

Check for stray dust or solder... I found an LG Plasma at the local tip which was not working but I cleaned all the dust out and what do you know it starts working again . I think it was cigarette dust because it smelt awful.

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

I've unplugged both buffers but the clicking remains. The top IPM chip on the "used" Y-Sus board does not warm up like the other one. It sounds like the clicking is coming from that chip also.

[tom66]

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?

Sounds like a buffer is still failed. Have you tried removing one?

[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?

[runyonwc]

Re: Vizio Plasma 50HDTV10a problem

Will do!

[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

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

[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

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

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

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

[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

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)

[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

[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.