Not sure if this will help.
My dad had a blue vertical line on the right side of his Samsung tv.. It was due to the cable feed from Comcast.
Simple test is to switch to the dvd input and see if you get the line there while watching the dvd.
For my dad, it was only with the cable feed.
My dad had a blue vertical line on the right side of his Samsung tv.. It was due to the cable feed from Comcast.
Simple test is to switch to the dvd input and see if you get the line there while watching the dvd.
For my dad, it was only with the cable feed.