EC firmware for the Lenovo-designed LCFC board NM-C931 at revision 1.0, covering the flash and EEPROM contents for a Microchip MEC1663 embedded controller. The name records version 0x02202445, a 2 KB EEPROM size and a CRC32 checksum of 0x010D86F0 for verifying integrity. EC faults cause no-power, charging or keyboard problems, so this archive helps restore the controller. NM-prefixed numbers are LCFC board codes. Verify the checksum after extraction and match the board revision before programming.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →