Working BIOS together with keyboard EC firmware for the Lenovo ThinkPad E550C, board NM-A221, for an ITE IT8586E embedded controller, labelled 100% working, RAR archive of 3.54 MB. NM- codes are LCFC board numbers. The EC file is flashed to the IT8586E, the BIOS to the separate SPI chip, and both matter when a laptop shows no power or keyboard response. Back up original contents first, make sure each image goes to the correct chip and matches its size, and confirm NM-A221 on the PCB.
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 →