My unit works correctly, howevere I used to have a solid blue LED power light in th efront of the unit and now there is no light of any kind… could the light have burned out?
Yes its possible. Its a common complaint posted in this subforum. For example a few past discussions via the forum search feature (magnifying glass icon upper right): https://community.wd.com/search?q=burned%20out%20category%3A105
See the following discussion where people are modifying the My Cloud firmware using SSH to change the color of the font LED.