Wi-Fi - Connection Failed (ethernet is working fine)

Hi team

A few days ago the Wi-Fi on our router stopped working. I tried powering off, waiting and restarting but still nothing. My phone would see the connection, but when I tried to connect, I got a message "Connection Failed". No other wireless devices would connect either (we have a few in our home). My PC is connected via ethernet and that works flawlessly.

At the time of the failure, I logged into the hub and changed the wireless mode to 802.11b/g/n mixed. This seemed to resolve the issue (although, before the failure, the previous setting was working on all devices). Forward a few days later to today and, even with the above setting set, the Wi-Fi has stopped working again.

The router does state it's on, but also shows that no devices are connected.

I've seen a post in the forum where somebody had a similar problem and a remote test showed that the router power levels were low. The solution was provided via PM.

Please can you help?

Thanks in advance

Dave