Thin green line on insignia tv - Insignia 37" LCD Flat-Panel HDTV

Sounds like a T'Con fault. If you wish to get more, check the site linked here. It has screen-shots to defective LCDs. You can see and compare it to that of your TVs' and can make sure about the fault. Check this link. http://electronicshelponline.blogspot.com/ Selecting the view option, either to Mosaic / Time slide, can be selected by the drop-down list, at the top left of the display window, will make surf easy. You can also do a search, by type in the brand name/model number/IC used, in the search box at the top right of the display window.