I can no longer contact my buffalo linkstation ls-q4.0tl/r5 on my network. When I start the unit I get 7 red LED flashes, then the pattern repeats. I have no indication that it's getting an IP address from my DHCP server (I can't see the MAC address in my list of DHCP leases). I tried the suggested methods for a factory reset but no luck. Scanning for the device using the NAS navigator software gets no results. Is this unit dead, or is there anything else I can do to revive it?