Create a bootable Linux OS on a USB stick. Google it for more info. Boot your Mac from the USB into Linux. Buy a SATA to USB adapter. Remove the HD from the MBL. Attach HD to adapter and attach via USB to your computer booted up in Linux. From Linux you can see if you can access the HD and if the data is there. If all is ok, then you should take the next logical step and do a Debrick. There are guides on this forum about how to debrick - search for them. The debrick process will NOT lose your data. After debrick, put HD back in enclosure and start it up. If still nothing, then the problem is not the HD, but the hardware of the enclosure. Then you can talk to WD and perhaps they will send you a new enclosure. If WD insisits you send the whole thing back for replacement, then you should take the HD out, conncect to LInux again, and copy off all the data to your computer. Because, WD will most certainly lose all your data if you send them the MBL.
http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-mac-osx
http://www.amazon.com/gp/product/B001OORMVQ/
http://community.wd.com/t5/My-Book-Live/GUIDE-Debrick-MyBookLive-v2-0/td-p/567582
http://community.wd.com/t5/My-Book-Live/GUIDE-How-to-unbrick-a-totally-dead-MBL/td-p/435724
The long and the short of it is that you have to get your hands dirty and you have to learn some new skills if you want to fix this MBL. Thankfully many users have created very detailed guides for novices to follow.
