@TP-Link thanks for the suggestions. I have done what you said. However after changing the main Deco I was unable to connect to the network or when I could there was no internet. I tried a couple of...

I have used the Deco and been very happy for about 18 months. But in the last couple of weeks it has been losing internet connectivity. The internet speed into Deco has been fine (200Mbps plus) but...