BIOS firmware for the Sony VAIO VPCCA15FG on motherboard MBX-239, Sony's own board designation. MBX-239 was used across the VAIO CA series, so the PCB code is a better match than the retail model number. The 1.40 MB ZIP contains an image for reprogramming the SPI flash with a hardware programmer. Read and keep the original contents before writing, since they may store model and serial data, and confirm the file size matches the flash 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 @biosarchive. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →