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We have a JVC color tv that is about 10 years old. We can get sound, but, only aabout 1/2' wide picture across the screen. Is the picture tube going out?

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Your CRT is probably not the problem, it is most likely one of the control circuits. Unfortunately while it is probably not an expensive fix finding a tv repairman may prove challenging at best.

Sorry
Rob

Posted on Dec 07, 2008

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Sounds like a Tab Issue,Connections are Become Bad on the Inner Connections to the Screen,The Real Fix would be to Replace The Panel

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We have a 32" standard sharp tv about 10 years old and we are having trouble with the picture. There are colored dots all over the screen.


Dear sir,your television is very old ,so picture tube is weak for this reson color dot all over the screen, replace the tube then is ok.

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hoz. out of sny. look for cap 200/100v

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hi..It sounds like your tube Shadow Mask may have got
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try this out..
thank u..
kindly rate my response..

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TV: bright line across black screen for several hours.


vertical output ic needs to be resoldered. careful leaving that bright line displayed on the screen as this will cause a permanent phosphor burn into the tube. this can not be corrected once burned unless you replace the tube. mch

Mar 08, 2009 | JVC Televison & Video

1 Answer

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Jan 03, 2009 | Televison & Video

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Does anyone know where can I buy a screen for a 27" LCD Insignia TV. Model is NS-27LCD? My screen creaked. I checked out e-bay and have not found a broken TV with a good screen. Does anyone know where I can buy a screen at. 
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1 Answer

JVC TV 27" Black line on top of screen


This is for the original problem.. Not the second post.

It's a problem in the horizontal deflection circuit. The parts will be available, but you will be in for some daignostic repairs also to find out why it failing or if it has failed on it's own.
There should be a few caps near the IC (an LA7840) that could also be causing the problem. Click the link, it will make it easier to locate the part inside.

This is the kind of repair best left to a TV tech, but get it done now and it won't cost anywhere near as much as it will later.

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25 inch sanyo tv


If the horizontal lines going through the picture are fine white lines, then I would suspect the picture tube as having a heater to cathode short or some other problem. Since some sets have had a 3 year warranty on the picture tube, you may be lucky unless the labor to replace the tube is more than the set is worth. Sanyo is usually not a good name in consumer electronics anymore, so if you're looking for a replacement I would look elsewhere.

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1 Answer

Tube TV - one thin horizontal line of bright light


Vertical defection failure. Common failure. Pretty easy to repair ($50-75?). However, my general rule of thumb is not to waste any more money on TVs over 10 years old. Too much other stuff in there ready to fail as well.

Jan 24, 2008 | Televison & Video

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