My laptop does not find the fritzbox 3727 anymore, what can I do?

I can describe it badly, I was the laptop in the network and then suddenly no connection, bottom right, the Fritzbox is not displayed at all, what can be the reason

Wlan on the lappi has turned off (unintentionally that works) :-)

lappi from the wlan area

router off

someone kicked you out of the wlan environment.

are there other wireless networks near you receive?

do you come with the mobile phone still via Wi-Fi to the net on your fritzbox?

So with the cell phone, I have Wi-Fi reception, and yes the laptop shows other net works, just do not hold mine, what can it be because or what should I do?