BIOS for the MSI CX420 laptop, board number MS-14531, delivered as a 2.43 MB RAR archive. MSI designs its own boards and uses the MS-xxxxx pattern; the final digit usually indicates the PCB variant. A technician uses the image to reprogram the SPI flash with an external programmer when the laptop powers on but shows no image, or after a failed update. Confirm the board number printed on the PCB is MS-14531, save the original chip contents, and check that the image size matches the chip.
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 @laptopschematics. 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 →