4 weeks ago I purchased a UE40D6530WKXXU set, a great looking set with lots of features. Unfortunately after 15 minues it switches itself off than on again and repeats this every 2 minutes for 40 minutes then goes off completely. Samsung CST told me that there was a common problem with the D series firmware and were trying to resolve it. I am told that the problem is with Digital transmission. Samsung posted a firmware upgrade on their website but this did not solve the issue so after4 weeks I am still without a TV and my patience is wearing thin. Has any other Samsung users had this problem?