BIOS image for the X451CA notebook, board revision 2.1, with clear in the name suggesting a cleaned dump, stored as a 3.30 MB RAR. X451CA follows ASUS model naming, though the brand is not given, and the name does not say what exactly was cleared. Such files are written to the SPI flash with an external programmer to fix no-post or locked boards. Check revision 2.1 on the PCB, read and save the original chip first, and confirm the image size fits the installed flash.
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 →