Hi. - any techy people that can help?

[RobBonbons]

We have sky broadband and have for the past 3  years had cctv cameras connected via the same WiFi.  2 months ago the cctv stopped working.  When trying to connect them.back to the WiFi it fails.  I tried the CCTV cameras on a different WiFi network and they work fine there so I know it is not the kit.  Additionally on the same day at home our printer disconnected from the WiFi and also will not rejoin the network.  

I have tried.....

Turning it off and on again  - resetting the WiFi, shouting loudly interjected with a threat to throw the dam thing through the window has also not been successful.  

All our other 'gadgets' continue to work on the Internet / WiFi and never did lose connection. Echo dot, phones, laptop, skyglass are all fine.

Any thoughts please? 

[Mark39]

You could try temporarily turning off the 5GHz waveband in your router's wifi settings, then seeing if your cctv and printer will connect. Sometimes devices can't clearly see the 2.4GHz band they use, while the 5GHz band is broadcasting.