try this Here’s how to fix the problem when your wireless router won’t connect to the Internet:
1.) Connect your WiFi router to the computer that actually gets an Internet connection and unplug/disconnect your modem.
2.) Find the MAC address of the computer that can make a successful direct connection to the Internet
3.) After getting the MAC address write it down and open up your WiFi router admin.
4.) Find the setting in the router’s admin panel which allows changing which MAC address to use; this setting will vary depending on your router manufacturer and model
5.) Change the MAC address of that setting to the one you wrote down in step two
6.) Apply the changes, then power down your router or unplug it
7.) Reconnect your router to your modem and then connect the computer(s) respectively
8.) After everything is connected, power on the modem (do not power it on until everything else is completed)
9.) The Internet connection should now work on the PCs connected via Wifi
The reason this trick works is because your ISP was blocking your MAC address used by that router. They can filter out MAC addresses on their end; if you connect a device that doesn’t have the allowed MAC address, they will not allow that device to get an IP address, thus no Internet connection.
