My ATV2 has suddenly stopped waking up from sleep. When I switch input from cable to ATV2 on my TV, the TV just sits there saying no signal. Pressing any button on the ATV2 doesn't seem to help - Menu, center button, play/pause nothing works. Sometimes the LED on the ATV2 blinks, sometimes it just sits there continuously on. But I still see no picture on the TV. Does anybody else have this issue? I am thinking of bringing the ATV2 back to the Apple store for a replacement. It is getting very annoying.