My N5200BR has been working continuously and reliably for quite some time. In the last few days I have had to power it down to relocate it. On power up it booted, reported a successful self-test and raid assembly. However there appears to be a total failure of ethernet connectivity, both on the WAN side and the LAN side.

The ethernet activity lights remain unlit, and the networking indicator on the front panel stays unlit. Using the front panel to (re-)configure and/or reset to default configuration reports success, but there is still no ethernet.

Devices connected to either the LAN or the WAN side report that there is no link detected.

Any help fixing this would be very much appreciated: this is my main fileserver and having it out of action is extremely painful. If repair or replacement is needed I'd like to get that in progress ASAP.