Lg tv has white screen with vertical lines

Possibly loose wiring going to tcon board

Watch video

https://youtu.be/prz9sNuxgWE

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.

1. Identify the TCON board.
2. Reset the Left side ribbon cables on the T-CON board
3. Replace CON board if you find a spare

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.
http://electro-medical.blogspot.com/
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. Line faults to all LCD screen are similar, irrespective of its brand and screen size.

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Mar 10, 2008 - Posted on Mar 17, 2012.

You said "I checked vertical output line from main ic pin 23 found correct"

But the problem is "Horizontal Output Line" Try that.

Just visit the site linked here. It has screen-shots to defective plasmas & LCDs. You can compare it to that of your TVs' and make sure about the fault, to an extent. It will be best I assume.

Call them to pickup or take back

I am getting a vertical green line on my lg 50 incs is the screen or have you a solution