what kind of internet connection do you have?
disconnect the router from the modem and connect a computer via network cable, on the back of the router is a reset button, press it for 30+ sec and it should reset it to Manufacturer default.
in your browser enter 192.168.1.1 and login using username: admin/ password: admin
Well im using timewarner and their modems are single port unlike verizon who will give u a dsl modem with built in router. and in answer to your question if i disconect the router from internet i wont have internet access itll just pull up no network page.