Firmware archive for the ThinkPad T450s on LCFC board NM-A301, 11.7 MB in rar, noticeably larger than single-image dumps for this board. The size suggests it may hold several files, such as multiple chip images or versions, so inspect the contents before picking one. LCFC uses NM- numbering for Lenovo boards. Use an SPI programmer to restore the BIOS, keep a copy of the original chip, and ensure each image matches the capacity of the flash device it is written to.
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 →