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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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HELLO
This is called "Field Collapse". Line collapse is different (a single vertical line) in the centre of the screen.
But field collapse is usually a fault in the field circuit (possibly a field output IC has gone short circuit) or electrolytic capacitors have dried out. The same can happen in a CRT TV - looks as if LCD panels are the same way! I think you will have to take this to a service centre.
GOOD LUCK! (:-)

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1 Answer

Bright line coming in center of screen


Hi Shailendrar , your problem sounds like vertical collapse , the whole picture has collapsed into a thin , very bright centre line ? maybe the result of dry solder joints , does banging on the side of the tv temporarily fix ? if so , the circuit board requires inspection for bad solder joints . Alternately the vertical chip/transistor may be blown , replace as required. Cheers T

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My LG tv has suddenly got a problem with the picture. Whilst watching the tv with no problems at all, the picture was suddenly reduced to a thin vertical line down the centre of the screen and an awful smell seemed to come from the tv There is a short ckt in your tv in horl. section. 1 isolate power from horizontal section. 2 check for normal output from power supply. 3 check parts in horl output section a hor.output transistor b diode & cap in h/output trnsformerckt. c check for print. d if all are ok check for eht transformer. e if every thing becomes then reconnect hor output section supply. f put on the set.

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1 Answer

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