j0hn, I have done the reset. Why wouldn't I have?
All lights come on bar the internet, with plugged LAN and the WAN flickering spasmodically slowly. Adapter settings show, whether using Ethernet or Wi-Fi, unknown or not network. As Windows Network Diagnosis can't cure, but the PN router doesn't suffer same problem. It cannot be the network adapters, else neither router would function. My conclusion, the Billion is knackered.
As to that massive boo, I'll add 'hoo', as I don't like spending money. Who does? Order is placed, and I'll live with it.