WLAN router flashes & no Internet: you can do that

If your WLAN router flashes and no longer sends a WLAN signal, there can be several reasons. We'll show you how to solve the problem.

First aid: router flashes, WLAN is gone

First, take the router completely off the power. Reconnect the device after waiting a few seconds. In some cases this solves the problem.
If the same problems occur again, take a look at the manual from the router. It describes exactly what the problem is. Simply google the model number of the router with the keyword "manual".
Alternatively or in addition, you can open the web interface from the router. Log in and look for the "Events" option, the "Event Monitor" or similar functions. There is also a record of the problem.

If the router no longer receives an Internet signal and starts to flash, in many cases this is not due to the router, but to your Internet provider. If there is a malfunction, there is little you can do about it yourself.
You can check whether there is a problem with your provider in the following practical tips: Telekom, Kabel Deutschland, 1 & 1, Unitymedia, Kabel BW. If the malfunction is a failure, there is only one thing left to do: wait.

If all of this does not help, you can reset the router to the factory settings in the last instance. If the problem arose with the router on its own, a reset is not very promising.
In the following practical tips you will find instructions for routers of the brands and models FritzBox, Speedport, TP Link, DLink, Netgear, Connect Box and Technicolor.