8 MB BIOS binary for an HP 400 G1, most likely a ProDesk 400 G1 desktop, although the short name gives no board number, revision or BIOS version. Treat it as an untested dump. The size fits a 64 Mbit SPI flash chip. Read and keep the board's existing firmware, compare the chip capacity, then program it with an external programmer. HP stores product and serial data in flash, so check those after a successful boot.
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 @ComputerBIOSBinFile. 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 →