Because the router is electronic, such events can happen anytime. This doesn't mean you should panic. You can simply reboot or restart your router if you encounter such issues. Just behind the router is a reset button. Hold this button for at least 10 seconds to turn on all the LED lights.Your router will enter reset mode once it has done so. You must wait until all lights come on. You must also remember that any active settings changes will return to the default.