I'm sorry to hear you're having these issues.
Does this happen on all inputs, or just the one that the cable box is plugged into?
I'm also curious to know if that line goes away if you unplug the cable box altogether.
If the unit is new, I might suggest exchanging it at the retailer. If that's not possible, it is covered under warranty and we can definitely address that issue if you need assistance.
showed up after 2 days, then it would disappear, now its back and won't go away. When cable is turned off its clearly noticable but when there is a picture on the screen one thin bar down the center with the colors being distorted to green in that specific area. giggling the wires in the beginning made it go away, so i thought it was the wires...Someone please tell me this is something I can fix or are these dead pixels? Did I just not hook it up right? I'm frustrated as heck...