BIOS firmware for a Dell Latitude 5400, given in an 11.3 MB RAR with no information about lock status, version or board number in the name. Treat it as a generic dump for this model and inspect the contents before use. Such images are written to the SPI flash with a hardware programmer to recover a corrupted or unbootable system. Always read and keep a backup of the current chip first, verify the motherboard matches this model and make sure the image size equals the flash 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 @biosfilebins. 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 →