There are many reasons for this fault. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter".
http://electronicshelponline.blogspot.com/
Vertical line fault to LCD TVs are given with illustrations. You can compare it to that of your TVs, and can get an idea about the fault.
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