No connection today after successfully installating Billion router yesterday

[Noelle]

Hello,
I have no connection since this morning. I used to have a Zyxel router with poor wifi performance. I switched to a Billion router sent by Idnet yesterday.
Yesterday, everything worked fine with a great speed. Now the light on the router is blinking and I have no connection.
Can anyone help?
Thanks to all of you!
Noelle

[Simon]

A simple first step might be to restart the router.

[Noelle]

I have solved the issue: the quality of the RJ45 cable provided with the router was very poor. I changed it and it works.