Cajunspirit,
Is the black line a result of an impact on the television, or did it just appear?
If it's a black line, it may require either a panel replacement or the replacement of electronics, depending on the issue. If it's still brand new, you can either return it to your retailer, or we can send a service technician out to fix the problem. You can schedule that at 800-SAMSUNG.
--HDTech
My uncle was using the television to play Valkyrie Profile 2 on this brand new 52" HD television through RCA cables, and now there is a permanent black line running horizontally across the left side of the on screen display. Regardless of the source?
What happened?
How can this be fixed?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic