My WDBFJK0040HBK-0A External hard drive isn’t turning on. I’ve had it for a few years so I’m not sure about warranty, but it just stopped working randomly. When plugging the cord in, the blue light will blink but not turn on. I bought a replacement ac adapter, thinking that was the problem, but it wasnt.
You should connect My Book with the computer to see, how it is showing in Disk Management. You can follow the steps provided in below article to check for My Book: