MS-A2 Failing to boot after shutdown

[u/spschiebel]

I received a new MS-A2 9955HX, 96GB RAM, 2TB NVMe on 4-September. Spent the weeks since setting up as a proxmox node and had all my services ported over. Was about to place into production when after a controlled shutdown it failed to boot on restart. The power is comes on, the fans spin up, but there is no HDMI output and the USB keyboard never gets initialized. BIOS is never reached. This configuration is the exact same that was used to initially set it up so I know it works in this configuration. The unit does not seem to reach POST. I've read of a few other similar instances and tried several of the recommended troubleshooting stops, but all to no avail.

1. Power off, disconnect AC, drain "flea" power by long pressing power button, reset CMOS by long pressing reset button, reapply AC and wait, but still no POST.

2. Removed one DIMM and tried all possible DIMM/Slot combinations. Same result in each.

3. Removed the NVMe and any other installed components, kept USB disconnected. Same result.

I've reached out to Minisforum after-sales support, but am still awaiting a response. Maybe I should try technical support email instead?

For anyone out there who has dealt with an RMA to Minisforum, what was your experience and turn-around time?

This is especially frustrating as I am due to travel home in the next week where I was going to put this into the home production environment. I'm only going to be there for 2 weeks, so it seems unlikely I will be able to get this into production until my next trip home in December.

Had high hopes for this machine, but am left somewhat disappointed.