have a Roon Nucleus One that’s running fine on my network, but I can’t get any HDMI outputs to show up under “Connected to Core” in the Audio settings. Everything else works — my other Roon zones (living room Arcam, Bluesound Node, etc.) play perfectly — but the Nucleus itself doesn’t list any local audio devices.
Here’s what I’ve already tried:
Rebooted the Nucleus several times with my Arcam AVR31 turned on and set to the HDMI input it’s connected to. Verified the HDMI cable works (the TV recognizes it). Stopped and restarted the Roon Server Software. Reinstalled both the Roon Server Software and the Operating System from the Nucleus web page. Waited after each restart, checked Audio settings every time — still no “Connected to Core” section.
The Nucleus shows Operating System OK and Roon Server OK (Running), and all my other endpoints are working fine.
Could you please take a look and let me know what to try next?
Describe your network setup
Ethernet connected to Arcam AVR along with my attempt to connect a HDMI cable to the AVR so I could play surround music.
Thanks for reaching out and for listing the troubleshooting steps you’ve tried. We attempted to enable diagnostics for your Nucleus, but it doesn’t seem to be responding to diagnostic requests. Can you please use these instructions to access your Nucleus RoonServer + RAATServer logs, upload a set to the below link, and let us know once uploaded?
Hello. I think that I did everything correctly and just sent you the zipped log files. Please forgive me if I screwed it up as I am not that proficient on the computer. The file was renamed with my email [moderated - private email address removed]. Please let me know what to do next
Thank you for providing the logs.
After reviewing the files, it appears that the logs you shared are from your Windows PC rather than from the Nucleus itself. Unfortunately, this does not give us enough visibility into the issue you’re currently experiencing.
We’ll need the logs directly from the Nucleus to continue troubleshooting.
Would you kindly follow the steps in the article @noris shared, focusing specifically on the section for retrieving logs from the Nucleus?
Additionally, as a side test, could you please connect your Nucleus to a TV or monitor via HDMI and share a photo of what you see on the screen? This will help us confirm the system state.
Thanks for giving that a try! Unfortunately, it doesn’t look like you’ve sent the correct logs folder over.
Using a Windows machine, open File Explorer and navigate to \\NUCLEUS\Data and use Guest as the username and password. You should then see the RoonServer folder.
Using a Mac, open Finder and navigate to smb://NUCLEUS/Data and use Guest as the username and password. You should then see the RoonServer folder.
Be sure to replace NUCLEUS with NUCLEUSPLUS if you have a Nucleus+, NUCLEUSONE if you have a Nucleus One, and NUCLEUSTITAN if you have a Nucleus Titan.
With that, a few additional steps to try:
Try this order:
Power on your AVR31 and set it to the correct HDMI input.
Ensure the HDMI cable is securely connected to the Nucleus HDMI port (not USB-C).
Power-cycle the Nucleus-unplug it, wait ~30 seconds, plug it back in.
After it boots, check Settings → Audio again.
Are you able to access the webUI of your Nucleus as well? Here’s more info:
If you could share a screenshot of this as well, that would be helpful. Thank you!
I am trying very hard here to do what you asked me to do. When I enter \\NUCLEUS\Data in the File Explorer it just spins around saying “working on it” but nothing appears after several minutes. When I tried entering it into my general search bar at the bottom of my home screen it shows up but will not open. I took pictures of both situations and attached same. I was on the WebUI a few days ago where I tried reloading and restarting those things as described in my initial message, all to no avail. I have also rebooted everything at least 1/2 dozen times, if not more, again to no avail. I also sent you the photo of my TV screen with it attached via the HDMI cable and was hoping that that would tell you something. While waiting for your response I even tried using a Dr. HDMI device to see if that would work but it did not. I am having a really difficult time understanding this and really need some help here. I am being overwhelmed with frustration and have already spent a huge amount of time on it that I really do not have to spare. So if you can tell me what to do I would very much appreciate that.
Unfortunately the image quality is very bad and impossible to read details. However, it sounds like you enter it into the search box of File Explorer instead of the address bar.
Maybe this helps to find where you should enter it:
I just spent the past 4 hours on this project and had to get some help from my AI chatbot. And yes, I saw I was in the wrong box initially but have figured that part out correctly. I performed a full clean reinstall of my Nucleus One (including resetting the database and reinstalling the operating system). The Web UI works fine at http://192.168.1.169 and everything shows “OK,” but Windows still can’t connect to the shared folders.
I’ve already:
Enabled SMB 1.0/CIFS file sharing in Windows
Allowed insecure guest logons
Restarted my PC, router, and Nucleus multiple times
When I go to http://192.168.1.169/smbstatus it says the page cannot be found, which makes me think the SMB service isn’t starting at all after reinstall.
Can you please confirm whether this service can be manually restarted or re-initialized on your end? I have spent way too much time on this and need you to tell me what I need to do here. And please do not say to send those zip files as it took me so long to find out that they are not being seen. So please figure out a work around.
Well, that webpage does not exist in a working Nucleus, so your browser is telling the truth. Did your “AI chatbot” give you this? Another AI hallucination, I’m afraid.
It sounds as though your Windows security configuration is still preventing you from accessing the Nucleus. And enabling SMB 1.0/CIFS file sharing in Windows is not necessary - the Nucleus understands SMB 2.0, as does Windows.
Please try following the steps given in this article:
If you have Windows 11 Pro, start at step 6.
If you have Windows 11 Home, start at step 8.
Thank you for your input but I am done with this. I am by no means proficient in computer related matters and I am also well aware of the limitations of AI. Had I tried doing this on my own it would have taken me 10 times to get where I am and I do not have that kind of time. And we are getting lost in the weeds with the need to locate the logs. The bottom line, and the most important issue here, is that the product is not working as was intended to do and is under warranty. The product was/is working fine for Ethernet connected functions. But the first time I tried an HDMI connection it did not work. I tried all of the usual fixes, rebooting everything numerous times, changing ports on my AVR, checking that the AVR ports are working fine with other components (they are) and even trying a Dr. HDMI device, and reloading Roon software, all to effect. I have also spent numerous hours following the advice of Roon Support and trying very hard to do as they say, even though their advice does not work. Therefore, as the unit is not working as it is intended to do so and is still under warranty, please advise the next steps in either refunding my purchase price or replacing the unit. Than k you.
Can you take a step back for a moment and post a screenshot of what is actually displayed in Roon’s > Audio screen?
You mentioned missing a “Connected to Core” section, but there should be a “Connected to Roon Server” section if the Nucleus is where you are running your Roon Server. Thanks.
We’re sorry to hear it’s been such a difficult process for you! @Geoff_Coupe makes a good point - you should be looking under ‘Connected to Roon Server’ in this case.
Here is a screenshot of where it says connected to Roon server. When I try and play music over
the HMDI input nothing happens. It plays fine on this avr over WiFi or Ethernet but nothing over HMDI. When I hit the Devise Setup button there are very few options and there are no Advanced setting options.
I’m sorry, but that photo is too small to discern anything clearly. Please see this article of how to include a screenshot in a forum post:
And screenshots of the Device Setup screen of the HDMI connection in Roon would be useful to see. For example, here’s what I have for the HDMI connection to my Denon AVR:
Please be aware that this Device setup screen is scrollable (even though no scrollbars are shown). So you may need to scroll down to see the “Show advanced” link:
Thanks for sharing that screenshot, it does look odd that there is no HDMI zone there when there should be one. I would like to suggest we try to perform a factory reset on the Nucleus One to see if that helps. To do so, please first create a Backup of your current database. Then once you have made a backup, please navigate to the Nucleus Web UI and perform a factory reset, first starting with an operating system reinstall:
If that still does not restore functionality, please try to perform a database + settings reinstall:
Then set your Nucleus up as a fresh server and verify if the issue persists. If the issue is resolved, you can then restore from the backup made earlier. Let us know if this helps, thank you!
Finally success!! The reinstall of the Roon Database and Settings seems to have accomplished this. Thank you so much for that suggestion. My Arcam is playing 5.1 music flawlessly via the HMDI connection. As I would like to understand this issue better, if you could briefly explain why you think this worked that would be great. Roon is back on the very top of my favorite audio devices!
Glad to hear that the database and settings reset helped resolve the issue! My theory is that there was something going wrong with RAATServer on the machine, there was a more complicated way to reset just that component, but the full database + reset achieves the same and is easier to perform. You should be good-to-go moving forward, but please let us know should you have any more issues. Happy listening!
> Audio screen?
