Exactly the same problem here.
I successfully upgraded to the latest firmware and after the reboot it was impossible to connect to the MBL.
I can’t ping it, connect through SSH nor connect to the dashboard. I have tried to do the reset procedure but without luck.
When I power on the unit, I can hear the harddrive gets “stucked” in a loop and after a while it gives up and is just unreachable with an orange light.
I will try to get it replaced by my local dealer tomorrow.