Errors and breakdowns of network Wi-Fi equipment

It is not uncommon for the Internet to stop working. The router stops distributing Internet to all devices. Very often this happens after a power outage, a thunderstorm(why did the router stop working after a thunderstorm), some repair work, moving the router to another location, etc. What to do in this situation, where to look ...

The problem when the router does not want to give out the Internet via wireless Wi-Fi network, most often arises in the process of setting up the router. When you bring the router home, it seems to be already configured, but then there is a problem with wi-fi distribution. That Wi-Fi network does not appear ...