Lost connection; all lights are

Some 80% of connectivity problems are at the physical layer. Check your plugs and use a known good cable. If the session is established (or rather attempted to be established) with a short in the cables, connectors or anywhere, it needs to be re-established after the short is corrected.
Keep the cords and cables away from your feet or any other thing that may bump them. If the kitty rubs lovingly on a dangling cable and there is a burp in the data stream, the session is lost and you have to re-handshake.