A duplicate 4540s BIOS dump with a (2) suffix, 8 MB, in raw .bin format. The model code fits the HP ProBook range, but the name gives no brand, board number or revision. An image of this size matches a 64 Mbit SPI flash. It can be programmed directly onto the chip when the laptop shows no display or loops at power on. Compare it with the other 4540s files, read and save the original first, and confirm that the motherboard number printed on the PCB matches the donor machine.
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 →