@cat0w
I remember updating OS few months back, and its upto date, but dont remember the version.
My device model is WDBCTL0020HWT, believe is a bought sometime in 2014… After searching more… I understand that this is Gen 1 device.
http://anionix.ddns.net/WDMyCloud/WDMyCloud_Specs.html
http://community.wd.com/t/gen-1-vs-gen-2-model-numbers/202757/8
Didnt understand your comment “If it is the blue LED may no longer work.”. Do you mean, if blue light is gone, its not possible to bring up the device at any cost? But, I know its is booting to a point where it can send emails, so, I believe something is not right only at the end part of booting.
Also is there a way to connect to a monitor and see boot log or error… like a linux boot shows up on the monitor?