Post firmware update problems WD Mycloud

Did you by chance unbrick your My Cloud at some point in the past? If so the inability to access the Dashboard after upgrading from v3.x to v4.x firmware has happened to some.

https://community.wd.com/t/unbrick-then-firmware-upgrade-equals-no-dashboard/136666

Otherwise try doing a 4 second reset and if that doesn’t work, a 40 second restore.

http://support.wdc.com/KnowledgeBase/answer.aspx?ID=10432