Keyboard and embedded controller (KBEC) firmware for the Lenovo ThinkPad T14s Gen 1 on the NM-C791 board. NM-xxxx numbers follow the board numbering used by LCFC, which builds ThinkPads for Lenovo. EC firmware handles power sequencing, the keyboard, charging, and fans, so a corrupted image can leave a board dead or failing to charge. Write it to the EC flash with a suitable programmer after reading the original. Check the board number on the PCB matches NM-C791 before flashing.
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 →