Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

[Shinju]

Hello

I picked this up I hopes of getting it back up and running, I replaced all 9 3300uf caps as they were all leaking and 1 1000uf cap that was also leaking.

The set turns on I see 2 green light on the logic board lights 2 and 4 and now 2 and 3 are lit up.

I hear the Ymain and Xmain boards buzzing and the sound amp make a slight bump when the set clicks on. I don't see any image/light or hear any audio.

I also checked the VA and VS, they seem off the VS is reading 404 and the VA IS 123, they are supposed to be VA 58 and VS 193. There is something wrong right there.

I have photos of the whole back of the tv but I cannot upload them from my iPhone.

Any idea on what to check next?

Thanks!

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

Let me know of you guys need more photos!

[xredhawk]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

pull wire from x board see if it will come on.

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

Wire, meaning the bigger plug near the top left of the x board? I did that and nothing changed.

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

Any other suggestions?

[cliff_hootarski]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

Are you sure you are measuring the Vs and Va correctly?

Voltages that high will almost certainly destroy the panel.

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

Whoops, had the wrong setting. Va 56, VS 180, also when I powered on the set to get the proper voltage readings I noticed that the logic board green lights 3 and 4 are now luminated, I turned the panal off waited 5 min and unplugged the x board and fired it back on the logic board now had green led 2 lit up. (Still no sound or picture), I walked away for about 5 min and came back to attach the plug and got a snap of electricity when re applying the plug to the x board.

So upon power up logic board led 2 is still lit I can hear buzzing from both Y and X.

Any idea what the 4 led lights on the logic board mean? The led on the front goes from orange standby to green active as of nothing was wrong when power up and down happend.


Thanks again!

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

I also been following tom66 plasma write up to the best of my abilities,kudos to him for that nice and helpful thread!

[cliff_hootarski]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

Those 4 LED lights indicate the temperature of the logic board. Don't have the service manual, but I imagine they light up normally.

Does the panel "prime" at all. In a darkened room, see if the panel goes from all black
to light gray, when first turned on. If not, suspect a Ysus board problem. I think there are 3 fuses on the Ysus,
two full size and one pico fuse (usually colored green). Have you checked them? (TV powered off)!

What is the panel number from the white sticker on the back of the panel?

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

The 2 glass cylinder fuses checked out on the top fuse is passing 56v the bottom is passing 175v.

Location of 3rd?

PDP50X4T000

No prime.

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

Y-sus board numbers are LGE PDP 061103. Board 50X4_ysus_2L_OSP
PARTNO: EX34151501

Rev c

Loc no 2xxx

[cliff_hootarski]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

The other fuse is a small white colored ceramic smd fuse located near the white four pin connector lower right of the Ysus board.

Is this your board? http://www.ebay.com/itm/vizio-M-VP50...item2a3b3154de

The Hybrid power modules located under the black heatsinks can fail in a manner that won't blow the fuses and cause a no picture condition.

See this link: http://www.ebay.com/itm/EBR36223601-...item19d30c1a29

Do the two large heatsinks get warm?

And I guess we have to ask, any sound from any input?

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

Hello Cliff,


I will check that fuse tonight, also the Sinks after a minute or two of being on get lightly warm I am not sure how hot these are supposed to get but I did leave it on for 5-8 min and they were luke warm I don't have a digital therm for an accurate reading.

Yes that is my board.

The people I got this from said it was working great then one day it wouldn't come on right away and it took awhile to come on then after about a month of that it just wouldn't come on at all.

When I power tested it before even taking it apart it would flash orange/green on the LED on the front of the panel then green then back to orange.


Here is a snap of the original caps on the board, the ones I replaced are outlined in red.

9x 3300uf 10v replaced with 3300uf 25v
1x 1000uf 10v replaced with 1000uf 25v

thank you for the help so far!

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

I also have a Toshiba 42HP66 I want to fix too but I want to do this one first, I love learning this stuff, I know plasma panels are the devil when it comes to a quick and easy fix but the fun is in the challenge. I feel that I can get this one going and with some guidance from the pro's here it can be possible!

[vinceroger69]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

have you tested the white cement resistors top right of board it says on the side of them what they should be.

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

have you tested the white cement resistors top right of board it says on the side of them what they should be.

I have not. I will do that.

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

I am also going to look for bad soldier joints too, the power supply board was quite flexible and heavy and it could be possible that over time heat and moving it around could have jared something loose.

[cliff_hootarski]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

Can you cycle through the different inputs with a video and audio input to see if you get any sound(HDMI,TV,component). Obviously the mainboard is turning on the power supply since you're getting Vs and Va. When you power up the set, do you get a green flashing light followed by a steady green light? Or is it followed up by a steady amber/yellow light(LED on the front of the TV)? The blown caps would more than likely cause the "takes longer each time to power up" problem.

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

No audio at all, I tried all hdmi ports, and red/white audio to all the l and r inputs and got nothing.

Caps have been changed, I was just showing what the old caps looked like before change.

Upon power up the led in the front of the set goes from oj to green a couple of times and then stays solid green.

[Shinju]

Re: Vizio VP50 HDTV10A replaced caps panel turns on no picture or sound.

/bump