When connecting the cable, the LED does not shine and the router does not work
Answer:
Hello. When you connect the cable to the computer, it’s probably not the diode on the plug that lights up, but the network card itself? Or, I just misunderstood you. What is your internet connection and what is your connection method?
Let’s first deal with the router without internet connection. Do a factory reset using the instructions /tp-link/how-to-complete-a-full-reset-on-the-tp-link-router-restore-factory-settings/.
Then turn on your TP-LINK TL-WR841ND, wait for it to boot up, and write down what lights are on/blinking. At least the indicator in the form of a gear should be blinking, and Wi-Fi network. And the power light should be on.
The router may be broken.
We have more instructions on how to set up this router model /tp-link/setting-up-the-router-tp-link-tl-wr841n-connection-internet-setting-and-wi-fi/.