Nucleus (not the + model)
I don’t understand the OS request.
The USB port of my Nucleus not showing up, only have HDMI A and HDMI B.
Can’t set up my $1,000 DAC 
In the case of Nucleus it will be RoonOS, if you go to the admin page it will list the details of …
This is useful information to confirm it is running the latest versions.
What DAC are you running (Manufacturer and Model)?
What USB cable is used to connect to it?
As a troubleshooting test, are you able to connect a different USB DAC to Nucleus?
And also try a different USB cable.
V 1.0, build 259 production
The DAC (Vinshine)and cable is the same one I had on my Nucleus+ before that died after 2 years.
DENAFRIPS ARES II R2R. Cable came with it
You can look up my Nucleus connected to your servers, I hope.
Seems like the agent info would have client information like “Nucleus, 1.0, “ etc.
Hi @Gary_Lang,
Thanks for taking the time to share your issue! As a first follow up, were you able to give @Carl’s above tips a try?
If you haven’t yet, I would also give your Nucleus a hard reboot, and leave the device unplugged for a few minutes before powering back on. 
We’ll be on standby for your reply!
Yes. Multiple USB cords were tried. Nothing worked
Got it, thanks for the clarification @Gary_Lang.
We were able to pull a diagnostic report from the Nucleus, and didn’t see any specific traces related to hardware failures. Let’s perform an OS reinstall as a next step. To achieve this, you’ll need to access the webUI of your Nucleus - here’s more information on that:
Once you access the webUI, you can perform the OS reinstallation. Let me know if your issue persists afterwards. 