You need to update the NVIDIA driver.
The updated LHR cards will not boot into HiveOS with driver 460.39
You will have to unplug the updated LHR cards and allow HiveOS to boot.
Then open the shell and type in: nvidia-driver-update --latest
Then power off and re-connect your cards and it should boot up.
The drivers I am running are: 460.91.03
What I have found is the original LHR cards will run at reduced hash rate:~100MH on ERGO
If I drop the driver down to 460.39 then the cards will run at: ~120MH on ERGO
I have split my LHR cards across 2 rigs
Original LHR cards on driver 460.39
Updated LHR cards on driver 460.91.03
The cards I am using are all EVGA GeForce RTX 3060 XC GAMING 12GB Video Card [12G-P5-3657-KR]
Let me know how you go.
Took me some mucking around to get it working.
Dan.