Nucleus One not visible on network after restart (ref#UM4WS2)

Is Roon Server running?

· No, Roon Server is not running.

For Roon connectivity to work properly, both Roon Server and Roon Remote need to be turned on.

· Roon Server is on, but I'm still having trouble connecting.

What do you see on your screen?

· "Looking for your Roon Server"

Please try to restart your network setup by unplugging, waiting 30 seconds and then replugging in your networking gear.

· No, the issue remains the same

Please select how you've connected your Roon Server to the internet

· Roon Server is connected by *Ethernet*

Have you checked your firewall settings to ensure that Roon is allowed through?

· Roon still won't connect even after checking this aspect

Have you verified that Roon Server is on the same subnet as your Remotes?

· My Remotes and Server are on the same subnet and I still can't connect

Sometimes the issues can be resolved with a reinstall of your Roon Remote app. Let's try to perform a reinstall and see if it helps.

· I've reinstalled the Roon Remote but it did not help

What is the operating system of your Roon Server host machine?

· *Nucleus*

Select any of the following components that are present in your local network setup

· None of the above

Describe the issue

I shut down nucleus one for a while, and when I restarted it, it was no longer visible on the network. Everything is as before the shutdown, the physical connection to the router works, I tried all the solutions found on the net, nothing works. I had this problem before when I shut it down. Then it resolved itself, meaning it started working after a short period, something that didn't happen this time.

Describe your network setup

Router ASUS RT-AC88u, 1gigahertz LAN

Hello @Mircea_Gherbovet,

we are sorry to see you are running into this problem.

First, we need to determine if your machine is physically booting up.

Please connect an HDMI monitor to the device and share a photo of what displays on the screen.

Check your router’s administration page to see if the device is visible on the network and has an assigned IP address.

Please also let us know if your network topology includes any additional hardware, such as network switches.

Thanks.

Looking forward to your reply.

Hi @Mircea_Gherbovet,

Are you able to access the Nucleus web administration page if the unit is powered on? Please also try the HDMI test shared above to see if the unit has a working network interface. Share a screenshot of the diagnostic output here. You can connect the Nucleus to any TV/monitor via HDMI to see the diagnostic screen.

No, I’m not able to access the Nucleus web administration page. I already try the HDMI test and I have already sent it.

Hello @Mircea_Gherbovet

Thank you for providing the HDMI output.

Looking at the HDMI screen, we can see that your Nucleus is booting up properly, but it is not receiving an IP address from your network. This explains why it is no longer visible to your remote devices.

This usually indicates a physical connection or routing issue between the Nucleus and your Asus router. Let’s try to isolate the exact point of failure by checking the physical hardware chain:

  • Check Port Lights: Please look at the back of the Nucleus where the Ethernet cable is plugged in. Are the small LED lights on the port blinking, solid, or completely off?
  • Swap the Cable: Please try replacing the Ethernet cable connecting your Nucleus with a different, known-working cable.
  • Change the Router Port: Try plugging the Nucleus into a completely different LAN port on your ASUS RT-AC88u router.
  • Bypass Extra Hardware: If you have any network switches or extenders between the Nucleus and the router, please bypass them temporarily and connect the Nucleus directly to the main router.

Please let us know if any of these steps help the Nucleus grab an IP address!

thanks for the help. I solved it. there was a fault with the router port, as well as the other free ones that I tested. apart from these, the rest of the ports worked. that led me astray

1 Like

Hello @Mircea_Gherbovet

Thank you for the update. We are glad to hear that the issue is solved. Enjoy your music!

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