I too have a Samsung 27" of about the same year which just this evening went to a horizontal line mid screen. No pic above or below. The line has some thickness and shows the picture, just sqwished down to a few raster lines, like in a vice.
Sound is fine, as is reception. It's just 20" wide and 1/4" tall.
I found this other link which may also be helpful:
http://en.allexperts.com/q/TV-VCR-Stereo-1749/Only-horizontal-line-tv.htm
This is July 4th, 2007, just missed the Boston Pops fireworks. Rats!
K.A. Hruzer
July 2007