BIOS package for the Lenovo ThinkPad E480 and E580 on LCFC board NM-B421, revision 1.0, dated 2017-10-30. LCFC produces Lenovo boards under NM-prefixed numbers, and both models share this design. Use the dump to recover firmware corruption by programming the SPI chip directly. ThinkPad images can carry machine-specific data such as the serial, so keep a backup of the original read, confirm the board number on the PCB, and check that the image size matches the chip.
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 →