No connection on some devices

[Nffc68]

Had full fibre 150 fitted 6th Jan, everything was working great until yesterday. Devices upstairs say connected but no Internet, then sky q box went the the same. Did a reset on router (unplugged it) managed to get skyq working. This morning I went and had a go getting the upstairs devices work (samsung tv, Xbox 1, + Ps5) Xbox and Ps5 wired TV wireless. Managed to get them all working. I came home an hour ago and they've all gone again. The router is showing three green lights voice light amber. When I do test on sky it says everything working. 

[Mr+Flibbles+86]

Hi there, I’ve escalated your post to our Community Messaging team who will invite you to a private chat shortly and help you with this. 

Just look out for the colourful bubble to start the conversation.

Here's more information on how Community Messaging works - https://helpforum.sky.com/t5/Did-you-know/Escalating-a-post-to-a-Sky-expert/ba-p/3711147