Defective sound card

I sold tv's for a while at Sam's Club. We probably sold 80-90 of these tv's while i worked there. 75% of these came back within a day or two with comments about the kung-fu like sound quality. The voices are about a half a second back from the action. Some of the members never notice the lag and love the tv simply for the picture. If you use a home theater system that does not involve an output from the tv it is great but that defeats the purpose of the dvd player. We also had a bunch come back because they would not play a dvd, that was not as common though. I hated to sell these and anytime i could i would steer them away. I didnt make commision so my main objective was making sure the member was happy.