There are many possible causes for problems while signing in with your Asus router account main login (http://192.168.1.1), some of them are shown below in 3 steps:
Check network activity:
The problem router Asus main login page not wanting to load may sound cliche, but the cause of Asus router failure is often a network cable disconnected from the router or network card. The problem may be found in the cable, which has become clogged or damaged.
Note: If the cable is connected to the router via the WAN port, you will not be able to sign in with your Asus router account main login and IP 192.168.1.1 (192.168.0.1), and the Asus router is not functioning properly.
Check the network status indicator:
There may be problems with in-network status indicators for the network cards and routers. What are the indicators? The LED is usually green. If your network connection is active (it flashes or lights up as soon as there is network activity), hold your router in your hand and look at your face. When you start the router, the router must always turn on the power indicator light.
Normally, only the numbers 1, 2, 3, and 4 are displayed. The LED will illuminate when the patch cable is connected to the router’s LAN port. If it doesn’t turn on, try connecting a network cable to a nearby port. If the light is not on the port-the router is broken and needs to be taken to the service center.
Check your Windows network settings:
On Windows 8 and Windows 8.1, press Win + W and type Network and Share. Find and tap Shortcuts and Sharing Center in the search results. Now right-click on the Change Map Settings link. Alternatively, you can press the Win + R key combination and run the ncpa.cpl command to open a network connection. Select a network connection, right-click and select the menu item Properties.
In most cases, automatic mode is there for IP settings. This configuration is first used to simplify communication between computers and network devices such as routers. With this configuration, Windows 8 receives an IP address from a DHCP server (provided there is a DHCP server on your network).
The DHCP server may not be working on all networks or down on your router. In this case, by default, the network card subnet is assigned a private IP address (169.254.XX). You can manually set the Asus router’s IP.
Reference:
https://www.asus.com/support/FAQ/1044653/