By disconnecting the power to the modem and the router for 30 seconds or so, you effectively reboot or "bounce" them. Unplug them both, wait 30 seconds and plug your modem back in. Once it lists itself as ready, plug your router back in. Try conecting and see what happens.
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People don't like to be meddled with. We tell them what to do, what to think, don't run, don't walk. We're in their homes and in their heads and we haven't the right. We're meddlesome. ~River Tam
Sedao