I purchased a Roku Ultra this afternoon and set it up with my LG tv which is several years old. We watched TV all evening and I attempted to turn the TV off using the new Roku remote. I pressed the power button and the homescreen went away and a white screen appeared with the message "POWER ONLY V3.05.4" floating around. Now, I can't turn my tv off even by using the power button on the side of the set itself. Pushing the power button on the Roku remote does nothing. I have no idea what is going on. HELP!