My wi-fi suddenly stopped working around 12 am today for no particular reason. All icons on the router are green. I’ve tried unplugging and connecting, restarting etc multiple times but still no connection. It is not a device specific issue as I’m not able to connect any of my devices to it. 

Both the Wi-fi and Internet symbols on the router are green though. 

I have the speed port 4 black router.

Could I please get some support? thanks!