My BookLive can't boot up. Always stuck on blue light

Yesterday when I backup some files to MyBookLive, suddently the connection is lost, the device is always in blue light. I can never re-connect anymore. I plug out the power and plug in again, seems the device can’t boot up anymore, it always stuck on blue light. There is also no connection light in LAN port. Appreciate anybody could help on this. Thanks.

Do you have any sound or do you feel any vibration? have you tried changing the power adapter itself with WD?

have you tried using a new cat5e cable?  Or a different port on your router?