I am facing the same issue. Has anyone been able to solve this problem? The point is that I'm already using ViaBTC.
And 2 out of 20 machines are not working properly. Maybe it's the firmware issue? But it's the same on every machine: Thu Jan 23 13:46:29 CST 2025.
The problem is the same as in the topic. After starting the miner, the hashrate and uptime fields are just empty. And in the log there is a 'kill all hashboard' entry, followed by nothing.

I had the same issue. I tried different pools and a firmware update. After the latter I noticed the one of boards was heating a bit more and started loosing hashrate earlier than others.
The seller suggested to send it to a service center.
But then I decided to check hashboards (like it is suggested in the paper instruction manual). And I found the problem.
One of hashboards fell out of the bottom channel and got stuck completely in a wrong position during delivery.
I detached all other parts (including all main fans) from the main aluminium body. Used a blowdryer to warm up the body a bit and pushed the hashboard with both hands on the radiator closer to the . Little by little it returned to the bottom channel.
After I assembled it back it has been working like a charm.
https://www.dropbox.com/scl/fi/v0r0x1lemerepf2d9e8wg/20250322_110313.jpg?rlkey=20jmm442gq75h3zycu4hre3wv&st=c542fp7l&raw=1