Firmware for the Lenovo ThinkBook 16 G4+ ARA, machine type 21D1 with an AMD platform, reported as tested by FST Fix. The name carries no motherboard number or revision, so identify the board from the PCB before use. At 9.34 MB, the RAR may hold a large image or several files, so inspect it after extracting. Such dumps are written to the SPI BIOS chip with a programmer to revive a bricked machine. Read and save the original chip first and confirm the image size equals the chip capacity.
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 @generalbios. 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 →