MyCloud 4TB disconnects from network

Same here: http://community.wd.com/t5/WD-My-Cloud/WD-My-Cloud-urgent-firmware-issue/m-p/733258 I did 2 times plug off and then plug power cord back. It hurts me to do it. But no other way during disconnect it hangs and only stil blue led. No way to restart. 4 second clicking restart button doesn’t help also.