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Tv has a line going thru the centre of the screen when i turn it on its like the whole picture has gone into a thin line

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This is a problem with the vertical circuit and can be either bad connections at the vertical IC or a defective IC. This is a common problem and is easily repaired. The vertical IC is a small flat IC attached to a heatsink with about 11 pins or so. It might be marked LA7837 or something similar. If you can solder, try resoldering the pins on that IC first. If that fails to resolve the problem, replace the IC. Expect the IC to cost about $15-$25 depending upon the exact one. It is possible that some of the capacitors in the same circuit are defective as well. Once the IC is replaced/resoldered, report back here with the results and we can go further if necesary.
Dan

Posted on Jun 13, 2008

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VIZIO 42 CLASS RAZOR LED SMART TV M420KD picture has lots of green ghosting and thin white vertical line through left side of screen also


Hi Charlene,

please try with video input from any device,and i think you are using local antenna and it has gain problem or your tuner section of the tv is not working correctly.
if distroted pictures comes with video input signal it is video amp and processing unit problem.
you have to go for repair shop for fix that.
regards,
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If you've ruled out that the source you're displaying from is good, I would contact vizio for a warranty repair

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2 Answers

I have 5 thin vertical white lines on the screen sound is fine.


It looks like the problem is comming from your LCD chips, they are starting to burn out and that is why you get this lines across your tv set, if you leave it like that the problem is only going to get worst
the lines will get bigger until it finally covers your whole screen you need to replace the OPTICAL BLOCK to fix this problem
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please rate this solution !!!!!!!!!!!!!

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the problem is vertical collapse,i am not so sure you can trouble shoot this on your own but you can send the board to eithor pts electronics or tristate module for repair
to get a price get the number off the sticker--left hand board(looking from the back) it will start CTC195---- write down entire number before you call them

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1 Answer

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If its a LCD projection TV (such as Sony Wega, Hitachi, Epson, Philips, and some Panasonic, some Mitsubishi), and the green image is in the whole screen or just one part as a blob or a line. Is most probably that one of your LCD Color Filters is damaged (burned out or starting to get busted), I don’t know if you can just replace the color filter, I believe you need to change the whole light engine system or the optical block. There are some places around, I found some on ebay but you should definitely try on discountdashmerchantdotcom their price range $260.00 - $330.00

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1 Answer

No Picture On Screen


it sounds to me like your tube has gone , go to your local tv repair shop and order a new tube its quite cheap to do so and they should be able to get it you quite fast.

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1 Answer

I have only the top line of a multi-screen picture (4 small boxes, all the same), below which are some colourful flashing very small boxes, and the rest of the screen is blank except for a big black box. ...


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It is not a bulb. It is a picture tube. If there are thin blue lines across the entire screen, not just the edges, and the picture itself looks too blue, it means that the blue picture tube is being driven too hard. This could be because the blue screen voltage is too high, the boost voltage on the blue picture tube is too low, or the video output is leaky or shorted. If the picture has what looks like blue arcs and double images on one or more sides of the picture, it means that one of your convergence IC's has burned out and needs to be replaced. These are things that should be tested and serviced by a qualified tech, so allow an experienced tech to handle it for you.

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