My 1 TB WD MyBook was hit recently by lighting, although it was not plugged into a computer at the time, but it was plugged into a surge protected power source.
At first it was just totally dead, but I replaced the power cord with a matching one from Radio Shack and now it powers up. Lights come on, and I can hear the disks spinning. But no recognition from my MacBook Pro.
I replaced the data cable.