Half screen problems are sometimes the DLP chip itself failing. I believe the chip is located on the dmd board as well. Not looking good for our tvs. A guy on another thread got with Samsung Executive Customer Service about his dmd board and he was able to get them to offer him a new tv. But he may have just gotten lucky, but worth a try. Don't stop at regular customer service, they will just tell you to go away, ask to be referred to ECS and who knows what they'll do. Try to be civil and not scream at them, as the other guy said that worked for him.