Firmware package for LCFC project ET481, the ThinkPad T480s mainboard NM-B471 revision 1.0, dated 2017-10-30 and stored as a 5.81 MB RAR archive. The name carries no BIOS label, but the size and date match the companion T480s BIOS set. Technicians use such images to reprogram the SPI chip when the laptop no longer powers or posts. Read and save the current chip contents before writing, and confirm the NM-B471 marking and revision on the board match 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 →