Fitlet2: BIOS Files

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For updating BIOS see fitlet2 BIOS update

* BIOS update recommended in case the system is unstable, or required fixes have been released. * Incorrect BIOS update has a risk for system brick, therefore follow the guide step-by-step.


  • BIOS version:
  • Reverted the front panel LEDs behaviour during the boot

CRITICAL NOTE: The BIOS downgrade can be done to the version not lower than FLT2.
The BIOS downgrade to the older version will lead to the total system brick and RMA.

BIOS for standard fitlet2

MD5: 594b551cd72df47c8013ef67a1b97ae8

BIOS for unbranded fitlet2

MD5: 74489060129ff76e2c3ec46567f90ecc

BIOS for MintBox Mini 2 (MBM2)

MD5: 7d18fab7e288e21ea48c39eb0822a712

BIOS for fitlet2 with discrete TPM

MD5: ca531bec1aa2e15da44586a26d55845e


  • BIOS version:
  • Update Intel TXE Firmware to version to address security advisory: INTEL-SA-00391
  • Update SOC microcode firmware:
    - M03506C9_00000040 (SOC rev. B and D)
    - M03506CA_0000001E (SOC rev. E and F)
  • Add the USB Power control in S5 power state
  • Add the front panel LEDs status during the boot
  • Add front panel LEDs and the power button LED behavior control

CRITICAL NOTE: Since the new BIOS contains the updated TXE firmware, the downgrade to the previous BIOS with older TXE firmware is restricted by the SOC manufacturer.
The BIOS downgrade will lead to the total system brick and RMA.


  • BIOS version:
  • Update AMI core to version 0.46
  • Update Intel TXE Firmware to version to address security advisories: INTEL-SA-00125 INTEL-SA-00142
  • Update Secure Boot variables
  • Fix COM Port bug in Linux
  • Fix restore setup settings to defaults bug
  • Replace dynamic boot order to fixed boot order
  • Fix blank Administrator password bug


  • BIOS version:
  • Update AMI core to version 0.40
  • Linux resume from suspend issue is fixed
  • Windows power button configuration issue is fixed (board rev. 1.2 only)
  • Wake-on-LAN issue is fixed
  • Linux Watchdog (iTCO_wdt module) issue is fixed
  • BIOS menus are revised
  • BIOS menus configuration is no longer reliant on RTC backup battery
  • TXE firmware is updated to


  • BIOS version:
  • fitlet2 rev. 1.2 support is added
  • Logo on the POST message screen is fixed
  • Evaluation Copy string is removed


  • BIOS version:
  • Update to BIOS core version FLT2.
  • Fix INTEL-SA-00088 vulnerability. Update of CPU Microcodes to M03506C9_0000002E and M03506CA_00000008