Hi. Sorry be away so just got to this now. No mesage is displayed. When you reboot, it briefly displays the Roon logo and then screen goes blank. Roon is still not connecting to the LAN.
The Nucleus does indeed need that drive to boot. That said, if you’re not getting any output via HDMI, it’s a sign that the board has gone out on the unit and I can confirm that it’s not been online since 9/22/22.
Please visit your local dealer and let them know of my diagnosis. If the unit is under warranty, this is a covered item.