Server How To Remove Computer Server And Replace With Regular Router?

How to remove computer server and replace with regular router? - server

I was wondering if anyone knows how to remove the server and replace it with a normal router. I tried to remove the old server and replace it with a router, but the internet died suddenly. I checked the server, and apparently a static IP address. How do I remove the server without the Internet? How to set the router to generate its own IP address? First the Web>> server modem>> Router Switch> clie ... Thank you.