Hi Xenofon,
We are still here, definitely! Apologies for not replying sooner.
Web Upgrade should work with either WiFi or Ethernet so it sounds like your B2 is not connected. Is it displaying an IP Address (connected to your network) and the clock (connected to the internet)?
If you run Setup WiFi - Settings menu - does the B2 display 'Scanning' and then a list of SSIDs it has discovered, can you select your SSID and enter a password, etc? If not let us know where in the process it fails.
Paul
Brennan Support.