ATV thought to be dead revived. Here is how I did it.
ATV 2 would not start up. Did the whole menu down thing, unplugging etc.
Finally, I unplugged power
Unplugged HDMI
Plugged usb into my MB.
Waited about 5 minutes
Plugged the power and hdmi back in
Unplugged the USB
Hit menu on the remote and on it came
Go figure