Second variant of a 4.00 MB firmware dump for the HP ProBook 6550b, numbered 2 in its name, perhaps a read from another unit or a different version, though nothing more is stated. It fits a 32 Mbit SPI flash chip and is written using a programmer such as CH341A or RT809. Comparing it with the other 6550b dumps in a hex editor can reveal differences. Save the original chip contents first, since they may hold system serial data, and confirm the board matches.
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 .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →