Horizontal line appears in scanned document

Normally horizontal line [a thin vertical line across the center of the screen] fault with CRT based TVs is the fault with its vertical scan output section circuit. Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
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Samsung LN46B650 Thin Black Horizontal Lines - Forums - CNET

www.cnet.com > Forums > Samsung

CNETJun 11, 2015 - I'm experiencing thin black lines from the top of the screen to the bottom. ... my lcd tv has multiple lines are horizontal it starts from the right and fades too the left, ... Samsung LN55a950 - Horizontal lines on right side - Forums - CNET
Jun 11, 2015
Samsung 52" LCD TV black lines - Forums - CNET - CNET.com
Jun 10, 2015
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Plasma TV Repair Horizontal Lines - How to Diagnose ...

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how to fix horizontal or vertical lines on lcd tv - YouTube

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Hi my LG 47ln5700 tv set has thin greyish black horizontal lineson one side of the .... I hope this works good with Samsung LCD as well....

Documents scanned/copied from the document feeder pass over a thin glass area where scanning occurs. Clean this area if sent faxes, copies or scans have black or white vertical lines.

1. Lift the document cover to expose the platen glass.
   
   
2. Wipe the ADF scan area (C) with a clean, soft, lint-free cloth moistened with water.
   
   
   
   
3. Then wipe with a clean, soft, dry, lint-free cloth making sure there are no residues left, especially on the platen glass.
   
   
4. Close the document cover and make a copy of a text document to confirm the black line has disappeared.

Fixed non moving lines usually means you have a problem in the panel display or t-con. If it is in warranty get it to a factory authorized service center. If not you can try to change the t-con and see if this fixes the problem, if not then it will be the panel it's self and will be cost prohibitive to repair.

replace the monitor: it's lost vertical scanning

Try reinstalling the driver software. If the problem still persists, run scandisk or reinstall OS.

S. Mohan

problem in vertical section.

1. Solder the vertical ic

2. vertical ic supply capacitor problen.

3. dry points in neck board.

Try these steps from

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bps03820&lc=en&cc=us&dlc=en&product=57956&lang=en

it is due to following reasons 1. dust on lense 2. connector problem 3. laser lense gone 4. missalingment

i have panasonic sophia tv 29" i have white horizontal line on middle of screen i know i have to solder ic but where is the ic located on main circuit board. thankx