Problems with samsung led 55' vertical - Samsung HP-R5072 50 in. Plasma HDTV

The problem is the LCD panel.

Check the TV signal input line to see if there is any problem, if there is no problem, call Samsung customer service hotline
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It is a common problem for the LG model. The problem
is defective LED back lights ASSY. You have to open the display panel & replace the burned LED strips.

The Tcon board or the LCD pnle is faulty.can confirm by replacing the Tcon board.
http://electro-medical.blogspot.com/

If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

Not good. You may have a tab failure. A repair shop may be able to diagnose and repair this, but most likely the lcd panel is broken. The panel is the most expensive part of flat tv's. A new panel will cost more than a used tv.

Time to start looking for a new TV

For a five or 7 inch band we have a fix. Six is a big problem. A vertical band is either a sync condition requiring an adjustment of one or more pots on the circuit board. Usually the condition is Horizontal and rarely up and down the screen. LED is generally very reliable and two of 3 colors within the diode in your case (one red and one green) are not working. If this TV is in Warranty, replace it as you cannot fix this yourself.