Purchased this Roon used last summer but didn’t attempt to connect it until this week. The unit initially showed up on the network but was non-responsive to the Roon Remote app. I attempted an OS reinstall of the Nucleus through the web interface, but it stalled and had not restarted after 6 hours. It appears that the OS reinstall failed. I connected an HDMI monitor and keyboard but the HDMI output displays nothing. The power light does turn on, however.
If you are lucky it might be just a dead SSD, it would not be the first in a Nucleus. You could try replacing that and trying to reinstall ROCK. If that boots / shows HDMI output, let the support folks know here in the forum so that they can flip the switch to enable the special Nucleus software (for heat management) on your device; they can do that remotely.
Or possibly just some connections got loose during shipping, so try reseating the RAM and reconnecting the SSD and possibly HDMI connectors
Thanks for the ideas. The Ethernet port does display lights, but since the HDMI port does not display output I am unable to proceed further. I tried the resetnetwork command using the keyboard but it does not appear to have worked.