I recently completed a jailbreak on 2 appleTV2s that were running 4.4.4. No issues on either, everything worked great.
Today we had a very quick power outage, and then the apple TVs were showing a fast blinking light. When I turned on the TV, the image for connection to iTunes was showing. My assumption was that I would need to go a Tethered Boot to get things going, but no matter what I tried I could not get the device into DFU mode. When I attempted to connect to iTunes to restore then redo the break, iTunes does not show the device in sources.
For now, when plugged into power, I get really fast white blinking light. On the USB I am getting medium speed blinks, but nothing will kick off DFU. I have tried menu-down arrow, as well as menu-playpause.
Any help is appreciated.