Drive will not regester

After starting to copy some files from 1.5tb Mybook essential, my computer locked up.  I interupted the transfer and cancelled it, then had to re-boot.  After the reboot, the Mybook would not register on my computer.  The little power LED just keeps flashing fast - (2 times a second).  I can’t turn it off.  I have tried pulling all the plugs but with no luck.

Any ideas?

Hi, try pressing the back reset button for 4 seconds and connect the mbl directly to the computer and try to map it from there.