Keyboard controller firmware for a Lenovo board NM-A281, for the ITE IT8586E embedded controller. NM-prefixed numbers are used by LCFC, the Lenovo-owned ODM. The 34.5 KB ZIP holds EC code, which handles power sequencing, keyboard, battery charging and fan control. A corrupt EC image can cause no-power, no-charge or keyboard faults. The firmware is written to the EC or its flash with a suitable programmer. Confirm the board number and EC chip match, and save the original firmware before writing.
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 .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →