That's not an HDTV set, though it des receive digital signals. It has
the same number of pixels across as a soon to be obsolete analog tv, and
only half as many vertical pixels (that's how it achieves 16:9 ratio).
True HDTV transmits in either of two flavors: 1920x1050 or 1280x768. And
picture quality wise it's pretty poor at only a 250:1 contrast ratio.

This time last year for only $100 more I bought a Best Buy branded LG,
"Insignia" 19" HDTV. Far better quality, many more features, uses
minimal power running off a cigarette pack sized inverter.

Take it back and get a real HDTV. You won't be sorry.