Mailbomb,
Good to see you have it all backed up, try these links, hopefully they will be able to help you…
http://community.wd.com/t5/WD-My-Cloud/Rebuild-your-My-Cloud-or-upgrade-the-HDD-on-it/td-p/675109
http://community.wd.com/t5/WD-My-Cloud/How-to-unbrick-a-totally-dead-My-Cloud/td-p/651195
Just wondering, how old is your unit…?
Good luck…!