Vizio VW42LHDTV10A horizontal lines on the left side

[tibimakai]

Sorry its a VW46LFDTV10a.
I have just picked up this TV in the rain and I haven't had time to really look at it, the screen has some scratches, but that it's another issue. By the way there is a method of reducing the visibility of scratches on a screen?
I was told that it takes like 30 minutes until I see a picture, but when I have tried it at home it just started right away and it showed some horizontal likes mostly on the left side and with video signal it looks like it's very slow that side and I believe that it's called ghosting when do you see a trail of a moving object.
It could be a bad T-con board?

[cashkennedy]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

3 things that might be the cause

1) bad t-con
2) loose / dirty / missaligned ribbon cables from the t-con to the panel, im sure someone has a guide on how to clean them with a pencil eraser on this site
3) tab bonding on the screen, try placing light pressure every 3 inches or so around the edge of the screen and see if any of them change the picture (this is least likely based on what the pics show)

you might want to also test the output voltages from the power supply just for the hell of it, since thats really easy.

[tibimakai]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

The 3.1V, 5V and 12V are all there. The 24V I haven't found it yet because there are two inverter transformers build into the power supply(there are a bunch of small ones on the master and on the slave boards).
Thank you for helping. To get to the panel's connector, I have to take the whole TV apart, very bad design.
I have never heard about cleaning the connector pins, could you elaborate on that please?

[cashkennedy]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

Ive never seen a dirty ribbon cable, but the commonly recomended trick is to use a pencil eraser to erase / clean the metal pads at the end of the cable. Not really any trick to it, but just be soft, and make sure all the eraser lint is off before reinserting. Im not sure why a pencil eraser is recomended over rubbing alcohol and a cotton swab.

Having the cable ever so slightly missaligned can easily screw up the picture though, sometimes ive had to retry inserting the cable 3 times to get them to work properly. Usually half the screen is handled by 1 cable, and the other half by the other cable, so usually when you dont have them in properly only half the screen is affected.

In your pictures theres 2 effects that are noticeable, but i think one might just be from your camera angle. Is the tv just having the black lines that end around the middle of the screen, or are you also getting a curvy set of lines through out the middle (cause that might be just from the camera angle).

[tibimakai]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

This one has four cables.
I will give it a try tomorrow and I will report back.

[budm]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

I use Detoxit for cleaning the connectors between the panel and the T-CON, works real well.

[tibimakai]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

this one?
http://www.radioshack.com/product/in...ductId=2104746
or this one?
http://www.amazon.com/DeOxit-Cleanin.../dp/B0002BBV4G

[budm]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

The one from AMAZON. D5

[tibimakai]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

After having the mishap with the flex cable, replaced the blown fuse F2 and the TV is back.
I have watched the TV with signal and the screen shows all kinds of things.
What do you see in my first post clears out, center has a darker spot which stays. Picture becomes horizontally sliced in like three, some of these freezing the image, some flicker.
Some times I have very good picture, specially the right side, the left is darker and the moving image is very slow.
If I restart the TV after a while the screen is mostly green, but it's keep changing.
I'm still waiting on that cleaner spray, I should have it by Tuesday.
I have a filling that the T-con is bad.
Tomorrow I will take some measurement on the regulators.

[tibimakai]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

After I have used if for a couple of minutes this is what I'm getting, sometimes the whole screen it's green, sometimes I have good picture, but the left sides it's darker and it's very slow.
http://img42.*************/img42/6748/smy.mp4

[tom66]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

In addition to the ribbons going to the T-con, there are usually ribbons going from T-con to the LCD. See if you can get access to them and reseat them.

The characteristic glowing and blurring of the screen "looks" like a T-con issue, but the loss of the vertical sync makes me think main board problem! Does the sound go when it freezes? The fact that it gets worse as it warms up seems to me like a BGA problem - you can thank lead free solder for that. Try applying some light pressure to each of the large processors on the main board and T-con. If that fails to change the results, use a hairdryer to heat up the boards until the fault occurs, then shut down the TV (leave it to cool down), then when it powers up heat the component again and see if the fault occurs immediately.

To reduce the appearance scratches on the screen you can try cleaning it with a soft moist cloth but mostly it's not repairable.

[tibimakai]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

Actually I haven't tried the LVDS cable yet, just the four ribbon ones.
I'm waiting on a D5 cleaner.
Thanks for the great ideas, I will try them out.
Sound stays the same, not changing at all.

[tibimakai]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

When I had the picture on the screen it looked very much like in this video, but had the moving object like a mouse trail in Windows, not sure how is called.
So on one side the screen the brightness is normal and on the other side it's dark.
I'm wondering if I don't have the same issue as in this video, tab bonding issue:
http://www.youtube.com/watch?v=vCExl...layer_embedded

[tibimakai]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

Here is another video, maybe it's better then the previous one:
http://img837.*************/img837/6362/l78.mp4

[tom66]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

When I had the picture on the screen it looked very much like in this video, but had the moving object like a mouse trail in Windows, not sure how is called.
So on one side the screen the brightness is normal and on the other side it's dark.
I'm wondering if I don't have the same issue as in this video, tab bonding issue:
http://www.youtube.com/watch?v=vCExl...layer_embedded

That's what it reminded me of. It's worth trying if you can get access to the LCD panel. Sometimes it's difficult.

It could also be T-con, since a missing waveform causes both problems, but with tab bonding issues it is because the tab physically separates but T-con simply doesn't send the data, so the effect is similar. The digital noise and jumping on the other hand doesn't look like tab bonding.

[tibimakai]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

I hope I don't have two issues here.
I'm uploading another video as I write this.
I will have to make a shorter video, it was to big.

[budm]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

Not sure if you had read this yet:
https://www.badcaps.net/forum/showthread.php?t=19852

[tibimakai]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

Found it yesterday, but I didn't have time to read it all.
Thank you for those links.

[tibimakai]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

I have cleaned all the connections at the T-con board and it got a little bit better, but what made the difference is when I have grabbed the whole TV's frame and twisted it a bit. I had a perfect picture, so it looks like I have a tab issue at the panel itself.

[cashkennedy]

Re: Vizio VW42LHDTV10A horizontal lines on the left side

YEP!!! if twisting helped you probably have bad tabs, welcome to the family lol! now figure out if that 10w resistor trick to a side tab works, cause i dont want to spend 3 dollars on some 10w resistors from radio shack unless it works lol!

But it would be a good idea to take your tv apart all the way down till the flimsy lcd screen is loose so you can see the tabs and apply pressure to them. If you can get pressure on 1 to consistently fix it, then id just use some foam, put it back together and sell it cheap.