I have the Above Samsung tv model. The tv comes on, automatically brings the smart menu up and then switches off after 8-10 seconds. It then starts up again and continues. I can occasionally interrupt the sequence to place on stand by and managed to get into the boot menu to do a factory reset but still have the same issue. Being able to get into this menu just seems random as haven't managed it again. Any ideas?
I also have this issue with my UE48H6700. It was working fine last night. I have found that the TV stays on if I disconnect it from the network, but obviously that renders all of the smart stuff unusable. Not happy Samsung!