Samsung TX-R3080WH 30" TV "thin black line hd" Questions

thin green line across the middle of the tv. When the set is shut off, there's a circular area slightly to the right of center with red/green around black. Wondering what this could entail, as this is

...black. But there is a thin horizontal line of "white" (about 2 inches tall), that moves from top to bottom. Almost like there needs to be an adjustment with vertical hold. With input 5, where I have ...