Providing Peter with a little more information than that about your gear and setup might solicit a more useful suggestion.
Have you re-booted the whole network chain or just the Lumin?
Ok...I have my Lumin hardwired to a Netgear extender. The WPS light is solid green. The light on the back of the Lumin where the network cable is Green and Amber. I did recently change internet providers and since then have had no luck having my Lumin Mini U to communicate with my USB (music server) it seems. I am able to use my IPAD and connect to the internet without issues. When I go to setup and select music library nothing happens. I have reboot, repowered , reinstalled and I don't know what else to do. Let me know if I can provide anymore info.
Does your server have both IP connectivity and USB connectivity direct to your Lumin? What Lumin model?
First part I am not sure...how do I check? All I know is that I have my USB cable from my Lumin connected to my WD Passport USB drive. The light on the USB drive is solid.
Model is Mini U
Mike
I thing he's just connecting a stand alone USB drive directly to the Lumin. Might want to plug that HD into a laptop or desktop and make sure it's still readable by them.
So you can't get outside on the Lumin at all? No streaming services or Internet Radio. You do have an account with TuneIn and are signed in I am assuming. If your Lumin can't see the Internet then it and your control device can't see each other either. Who is your internet provider?
Remember that attached drives need to be single-partition only (and formatted FAT32, exFAT and NTFS only - but this is common).
Another quick test would be to connect a small USB pen-drive/thumb-disk with a couple of very standard WAV files on there.
I think you said that in the app, you could see the USB server show up on the settings under Music Library. That suggests that the LUMIN is showing up on at least the local network correctly.