You will have to remove from power and, do a HARD Reset of the router. After this you will have to set it up from the beginning again, just like you did when you first got it. Go to your browser and set it up. Also perhaps it may be best to disconnect from Phone jack, plug in the cable from Modem, to router, plug in and power up modem, plug in and power up the router, set up modem, set up router.... from PC.