This is usually caused by some form of electronic failure. According to your "Ask The Experts" submission, this set is only a few months old and still under warranty.
If you're hesitant to ship it to them, you could try to exchange the at the retailer that sold it to you. Often they'll exchange defective products within the first 90 days. Otherwise, send the TV to the manufacturer for repair. You may be out the shipping cost, but it's a lot cheaper than buying a new one.
This is usually caused by some form of electronic failure. According to your "Ask The Experts" submission, this set is only a few months old and still under warranty.
If you're hesitant to ship it to them, you could try to exchange the at the retailer that sold it to you. Often they'll exchange defective products within the first 90 days. Otherwise, send the TV to the manufacturer for repair. You may be out the shipping cost, but it's a lot cheaper than buying a new one.
Good luck, and let us know how it goes.