RAR archive with a 2MB BIOS for the HP Compaq 4000 Pro desktop, referencing the Tiguan motherboard at revision B in its name. The 2 MB capacity points to a 16 Mbit SPI flash chip. Such dumps are used to recover a desktop that no longer posts after a failed update or corrupted firmware, by writing the chip with a programmer such as CH341A or RT809. Extract and check the file size matches the chip, confirm the board revision, and save the existing chip contents before flashing.
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 →