@CaseyJames Fixed - realised while trying to logon via web that the IP address was changing everytime it reconnected. Fixed the IP address of the WPA7517 in the router software and as oif by magic -...

Actually a TL-WPA7517 kit (not listed in Model list). Have used an AV500 system successfully for many years, but wanted to fill a dead spot in the house with a WiFi extender so bought a TL-WPA7517...