This is easy. Restart the router. There are two methods:
1. On the router configuration page, find system Settings and restart the router.
2, unplug the router power, after a few seconds to plug in, let the router reload the program is ok. If these two methods are not good, there are 2 less common possibilities: 1, others enter the configuration page through a wireless connection, enter the password, enter your router page, configure your router, inadvertently turn off the wireless function. (The probability is very small, unless you encounter a rookie) 2, the router program is confused, and it needs to return to the factory Settings. Near the router power supply, there is a reset button, with something like a toothpick, hold down for 5 seconds, let go, that is, complete the restoration of factory Settings. You can reconfigure the router. I hope it helps. Ask if you have any questions. Typing is not easy, score friends please go around. Reference: I am a network administrator