1: Try to visit the internet by using the modem cable.

       1.1: Able to visit the internet. --> Check whether other computers can visit the internet with the same router.

             1.1.1: Able to visit the internet. --> Check whether LAN, WLAN work normally.

                    1.1.1.1: LAN, WLAN work normally. --> Check Internet settings.

                           1.1.1.1.1: Setting correct. --> Reinstall the OS.

                                  1.1.1.1.1.1: Problem solved. --> OS problem.

                                  1.1.1.1.1.2: Problem persists. --> Contact ASUS service center for help.

                           1.1.1.1.2: Setting wrong. --> Reset the network.

                                  1.1.1.1.2.1: Problem solved. --> Network setting issue.

                                  1.1.1.1.2.2: Problem persists. --> Contact ASUS service center for help.

                   1.1.1.2: LAN, WLAN work abnormally. --> Reinstall the LAN & WLAN driver.

                           1.1.1.2.1: Problem solved. --> Software issue.

                           1.1.1.2.2: Problem persists. --> 1.1.1.1

              1.1.2: Unable to visit the internet. --> Check whether internet available after setting the router to Factory Settings and reset the IP address of the router & notebook.

                   1.1.2.1: Able to visit the internet. --> Router setting problem.

                   1.1.2.2: Unable to visit the internet. --> Contact the device manufacturer for help.

       1.2: Unable to visit the internet. --> Contact ISP to solve the problem.