Firmware package for the HP 4540S notebook, most likely the ProBook 4540s, in a 3.37 MB RAR archive. No board number, BIOS version or flash chip is stated, so extract the image and check that its size fits the chip on your board. Technicians use these dumps to fix boards that will not boot after a failed update or flash corruption, by writing the SPI chip with a programmer. Back up the existing contents first and make sure the board revision matches before writing.
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 →