[enRo]

Try this:

Unplug the power your MODEM for 20 seconds. While that is unplugged, do the same to your router. After 20 seconds, plug Modem back in and let it fully boot. Once that is fully booted, plug in your router. Once that is booted, check to see if you have internet. If your net is still down, grab a pencil or paperclip and press/hold the reset button located usually on the back of the router, for i believe its 7 seconds (but hold for 10 to be safe) and let it fully boot again.

You can always go into the routers firmware by going to its local IP address and resetting all settings to factory specs. Tho, that should be your last resort. If you choose to do that, and it DOESNT work, then your router is fubared.