When I turn on my YouView Box it sends my Samsung TV into a cycle of switching off, back on, off etc. Sometimes this can last for a good 10mins. I have tried changing HDMI cables & ports but it makes no difference. My Samsung TV will happily stay on if the YouView box is turned off. I linked both devices to the one control but then unlinked them to see if this made any difference. Sadly it did not. This problem is becoming increasingly irritating!!