Troubleshooting Help - New System won't boot

Hey!

I've been using FreeNASfor about a year now, running on an old pc and I wanted to upgrade. I read the hardware guide andwent shopping according to it.

Here is a list of what I've got:

CPU: Intel Pentium Gold G5400 2x 3.70GHz So.1151
MB: Supermicro X11SSM-F Intel C236 So.1151
RAM: 8GB (1x 8192MB) Transcend TS1GLH72V1H DDR4-2133 ECC DIMM CL15-15-15 Single
PSU: 550 Watt Corsair Netzteil RM550X ATX Modular (80+Gold)
HD: 2x 4000GB Seagate IronWolf...

Troubleshooting Help - New System won't boot