I purchased an Insigna HDTV (or so I thought) at Best Buy a year ago, anticipating the February 09 conversion. I also bought a HD specific antenna, since I don't subscribe to either cable or the "dish". However when our local TV stations ran a "test", the resulting picture indicated that my TV failed. Did Best Buy make a mistake, or is there something I still need to do? (convertor box / program TV)

Is the unit under warranty still?

I was not aware that there are HD specific antennas. But, that aside, I don't know enough to answer without the model number of your set and information about the antenna, such as how you have it connected, is it amplified?
Best Buy is usually pretty good about helping with solutions. Have you called or visited a store? Be sure to ask for the Geek Squad person/s that are specifically assigned to TV's. Also most of their Dept heads are pretty knowledgeable concerning conversion and the associated problems. My apologies for not having a better answer.

Sam Bass