We have computers connected to a network switch. When you add new computers they get "unable to reach dhcp server gets 169.254". If you connect old working computers to the same network cable that doesn't work with new computers it works. My guess is that either the DHCP server is down or that it has run out of IP addresses to "hand out". Any tips or suggestions where I can continue to look. I don't have access to the DHCP server.