You may be able to open the enclosure and remove the drive and hook it up to a computer directly. Your problem could be a bad enclosure.
How to open a Western Digital MyBook
1. http://www.instructables.com/id/How-to-Open-a-Western-Digital-MyBook-USB-Drive./
2. http://carltonbale.com/2008/01/western-digital-my-book-opening-the-case-removing-the-drive/