Best Buy Defective Merchandise

We purhcased a 32" LG HDTV from Best Buy. After opening it the next day and setting it up following manufacturer instructions we found there was no picture. Returned it to Best Buy on December 26 and was informed we must haave damaged the set and there was nothing they would do. We did not damage the set in anyway, after several attempts they still refuse to refund or exchange the product. The manufacturer LG has said they would not intervene. As of this date it has been turned over the the Kanas Attorney General.