We're sorry to hear you did not have a positive experience with your TV. Retrevo is not affiliated with Best Buy nor included in any transactions with buyers and the retailers. As Best Buy is a reputable store you may wish to speak with other people or escalate the issue to the managers.

If things can't be resolved with Best Buy you might consider contacting the manufactures repair service centers directly. I don't know which brand you have but most of the known brands have a single service center that deals with repairs. In fact they tell you NOT to go back to retail. I've had a 5 year old Sony receiver fixed for free when I went this route. 

If you can't find a manufacturer repair or even a local brand certified repair shop to fix it for less than it costs to get a new TV, then one last oppty is sell it on eBay and salvage some dollars.