Sounds like a panel fault. Contact any service technician to confirm. If you wish to get some details; check the site linked here. Viewing it in "
Mosaic" will make surf easy. Surf the site with patience. Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/
Screen-shots to defective LCD TV panel is given. You can compare it to that of your TV's, and can make sure.
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