What to do if the router does not work?

Question

Computer networks

TP-LINK router. The WAN (planet) Internet connection indicator does not light. Directly if you connect the cable to the PC, there is Internet. If an Internet cable is connected to the WAN connector, then the planet does not shine, and if a patch that connects the PC and the router is connected to this connector, then the planet shines. What could be the problem? Restarted and reset the router to the factory 150 times.

Answer 1

Not planets, but show the WAN configuration in the router - maybe you have a static IP listed there. Maybe your Internet provider tied to the MAC address of your PC's network card when you set it up.
Try to clone the MAC address of your network card into the router - TP-LINK can do that.

Answer 2

There is a little lack of description of how exactly the provider distributes the Internet to you and counts the traffic.
In a situation similar to the description, I personally had that for some reason the router did not prescribe DNS settings to clients that were distributed via DHCP. And it really worked on a computer if you plugged in a provider's ethernet cable directly, but it didn't work through a router.
In the simplest case, after resetting the settings, as I understand it, the router will receive the WAN port address via DHCP, then translate addresses through NAT to LAN ports, in which clients are also given an address via DHCP, but from the router.
Write the address and other settings (default gateway and DNS server) that your ISP distributes to the computer. And then compare them with the settings of the WAN port of the router, and the settings that your router already distributes to the computer, if you connect everything through the router in a gap.