Resetting your router is usually as simple as shutting off the power for 30 seconds before turning it back on.
If this doesn’t work, you can try rebooting the Wifi hardware by pressing the reset button. It is important to keep in mind that once the router is restarted, it may require a full reconfiguration.
Why reset the hardware? It is possible for wifi equipment to malfunction, just like other electronics. Software glitches are most often to blame, but direct hardware problems can also occur.