Tried to change TV settings without success so rang Samsung support they have told me how to activate UHD (will try this evening) in the meantime I tried to flash with Vix Image from usb without success (think it didn't like the usb I was using) So I flashed the box with another OpenATV image that was available through box itself, I didn't get chance to try it last night as had to scan all sats again. Will try all of these options tonight. Thank you for info about Openwebif never used it but it looks a useful tool. I'm really hoping that the UHD settings will do the trick.