The Network Diagnostics shows a green light for Ethernet, Network Settings, ISP and Internet but the Server is red and says Failed: the Message reads 'This computer appears to have a working Internet connection, but cannot find "EPSON". You may have typed the address incorrectly." (Not aware of having typed any address, correctly or otherwise, and it was working fine until now! The ? button says:
Network Diagnostics has determined that your Internet connection appears to be working and can connect to the Internet, but can’t connect to the server you are looking for. There may be something wrong with the server you are trying to reach.
Wait a few minutes and then try again.
If you continue to have problems, contact your Internet service provider.
Is that the problem do you think?