Summary of problem.
The PC wont connect to the internet.
When you have IP Address set to auto it picks a local IP Address but does not see the gateway 192.168.16.3 or a DNS Server 192.168.16.2 or a DHCP Server 192.168.16.2.
When you manually set up the IP Address You can ping the Router 192.168.16.3 and an external DNS server 22.214.171.124. You cant ping www.google.ie
I dont know why this PC is not connecting to the internet. My thoughts are that there is a problem with the DNS side of the house but I dont know how to go after it.
The NIC is built into the motherboard and I presume it is working correctly because it will allow me to ping external sites.
I have now installed a new PCI NIC but it has made no difference.
Attached is a detailed document including screen shots that may be of assistance.
Regards Heber Mac Guinness