It could be the sound dock. My Bose refuses to make any noise sometimes. When that happens, I unplug the Bose from the power source and leave it for at least 20 seconds before plugging it back in. It then works.
At the time that you lost your power, was there a voltage surge? In other words, if lightning struck your power line and sent a massive voltage into your home, that would proabbly destroy any electrical device that was plugged into the power at the time.