Some motherboard BIOS files contain the onboard LAN MAC address.
You mentioned looking for a .bin file.
Use the Wayback Machine (archive.org) to search for defunct OEM websites like: nutmeg-mini-itx rev 1.0 bios bin file
Search for product codes like "NM-ITX1" or "Nutmeg-Mini-v1". Some motherboard BIOS files contain the onboard LAN
Assuming the file is valid for a real Mini-ITX board: Use the Wayback Machine (archive
.bin, .rom, .bio| Error | Likely Cause | Solution | |-------|--------------|----------| | "BIOS ID Mismatch" | Wrong BIN file for Rev 1.0 | Double-check revision number; compare with board silkscreen. | | "ROM file size is incorrect" | Damaged download or wrong chip type | Re-download from trusted source; verify size is 1MB. | | "Boot block recovery failed" | SPI flash has bad sectors | Desolder chip and use external programmer with "ignore bad blocks" option. | | After flash: No video, but fans spin | CMOS checksum error | Clear CMOS (jumper or remove battery for 1 hour), then reboot 3 times. |