It just won't stay on. It keeps restarting on me. It's getting frustrating. I can't sign into my NHL Gamecenter app fast enough because it just reboots. I'm almost at the point of taking it back to best buy and perhaps investing in Google TV.
I keep mine plugged into surge protectors. Try without the extension cord. (maybe cord bad). Alternatively, try using another power adapter. (any 5volt 1amp cell phone charger should work). Finally, I would try the TV USB power port. If none of these power supplies work, then you indeed have a faulty/defective device that needs to be replaced.
Roku Community Streaming Expert Just another Roku user... I am not a Roku employee. Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102