Yeah, returning it is not an option, unfortunately. Bought it in early 2014.
I emailed the above photo to three local TV repair techs for their opinions.
The first tech said: "Plasma display panel part number, MD65F16C3A, is no longer available, even if it's still available the price alone on the panel is over $2k." I replied and asked him if he thinks it could be anything else, like a bad board or something, and he said "Could be a C driver board but rarely, and that is also no longer available."
Second tech said: "From the photo, it looks like it's going to be a display panel (screen) problem. Normally, whenever there's a bar or lines going through a picture it will be the failure of one section of the panel. This, unfortunately, is too expensive to repair due to the cost of the screen. In most cases, the plasma screens are no longer available due to the age of the TV and the fact that Plasma's are considered outdated."
Third tech said: "It is likely either a buffer board failure or display panel; the latter of which cannot be repaired. We would not know which until we open the television. If it is indeed the buffer board, the repair estimate may be between $300-$500."
So, I would love it if the TV could be fixed at a reasonable price but I am thinking that chances are likely that I am probably going to have to buy a new TV. Looking at OLED.