At this point, I'm not aware of it being a "known issue" or something that we cover past the warranty period. I'd recommend having the unit inspected by an authorized technician.
I have a Samsung LNT4671FX LCD 19 Months old with Vertical Red Lines in all sources with or without anything connected. Was intermittent but now on most of the time. Any help would be greatly appreciated. According to the internet this is not an isolated condition and I hpoe Samsung is looking into it.