@TP-Link OK; factory reset worked, but the same problem persists: the Musiccast just won't connect to the internet in the setup process. The modem was supplied by my ISP, TPG. It functions fine with all other devices; internet connection is fine (NBN service is also good). I can login and look at and edit settings all fine (but I'm not doing that again). But when I get to the point of setting up MusicCast on the WiFi connection, it gives the message Connected without Internet. And then, when returning to the MusicCast setup protocol, it is not finding the device. It seems to be a common problem with Yamaha MusicCast. When the Yamaha hardwars was originally installed, it worked fine for a few days and I was able to easily stream music - Spotify. Any ideas?