Sorry to hear that.
I had the same symptoms (green/yellow lights constant, no response to http). Once I set up the 1.104 subnet, I was able to see the IP of the device using arp -a from a command prompt and confirmed that it was pingable. TFTP didn’t work until I turned off the Windows Firewall on the TFTP server. You might try that. Also, I don’t know what ports TFTP uses, but your router might be blocking them too… I just connected the EZSrve through an unmanaged switch connected to the TFTP server.