Thanks @Kevin_Z Initially the hard reset did the trick, but a few days later it's back to showing the network but saying "Failed to obtain IP address". I've installed the tp-PLC Utility app on my...

Model = TL-WPA4230P All of a sudden my powerline extender has started saying it 'could not obtain IP address'. Any ideas? Nothing has changed in the set-up. I've since tried re-pairing and then...