You'll see that on many LCD TVs. All the parts it could be are non-user-serviceable. Get estimates to compare with replacement costs. It could be the panel which is definitely when you find it costs more to fix than replace.
Hi,
My samsung smart TV is showing colored lines (see links)
I have tried to move the HDMI connector a bit around and turning it off for a long time and turning it back on.
http://tinypic.com/view.php?pic=11100ev&s=8
http://tinypic.com/view.php?pic=20a5erq&s=8

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