RAR archive of firmware labelled simply z400, roughly 3.17 MB, with no brand, board number or version given. The label could fit more than one product, such as a laptop or a workstation, so open the archive and check the files inside before assuming compatibility. Firmware dumps like this are usually written to the SPI BIOS chip with an external programmer to fix a no-boot condition. Match the motherboard number printed on the PCB, verify the image size against the flash chip and read out the original chip first.
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 →