No wi fi connection

[Jst3700]

The WiFi connection just stopped and our sky glass tv has no picture. On checking the wi fi it says everything connected 

[Graham132]

• We have some devices connected and some not. Apparently the WiFi is all OK according to sky yet our main PC can't even get 1mb

[CMBrown2402]

Having huge issues with broadband and WiFi. 

Tv, laptops not connecting and sick of spending hours rebooting