https://routerhelpsporter.blogspot.com/2019/05/how-i-can-solve-rout...
INTRODUCE OF ROUTER
A router is a networking device that forwards data packets between computer networks (one computer to another). Routers perform the traffic directing functions on the Internet. Data sent through the internet, such as a web page or email, is in the form of data packets. A packet is typically forwarded from one router to another router through the networks that constitute an internet work until it reaches its destination node.

A router is connected at least two or more data lines from different networks. When a data packet comes in on one of the lines, the router reads the network address information in the packet to determine the ultimate destination. Then, using information in its routing table or routing policy, it directs the packet to the next network on its journey.
The most recognizable kind of routers is home and little office routers that essentially forward IP data packets between the home PCs and the Internet. A case of a router would be the proprietor's link or DSL switch, which interfaces with the Internet through an Internet specialist co-op (ISP). Progressively complex switches, for example, venture switches, interface huge business or ISP arranges up to the amazing center switches that forward information at rapid along the optical fiber lines of the Internet spine. In spite of the fact that switches are ordinarily devoted equipment gadgets, programming based routers likewise exist.
When you will connect your router to your PC and nodes then you will face many issues;
Run time errors
Device troubleshooting errors
Internet connectivity issues
Configuration with the PC issues
Router firewall issues
Router driver up-gradation problems
If the router has been connected to the internet and worked in the past, confirm the signal from your internet service provider (ISP) is not the problem:

1. Turn off the wireless function and directly connect your computer to the router with an Ethernet cable.
2. Reboot the computer and check for an internet connection.
3. If there is still no internet connection reboot the router and any modems in use.
4. You can also repeat this scenario with your computer directly connected to the modem instead of the router.
Therefore, if you are still not getting an internet connection within your router then you can contact Router Help Support.