Firmware archive for the Sony MBX-224 VAIO motherboard, 1.65 MB in ZIP format. Apart from the board code, the name gives no model, version or chip details, so check the contents after extracting. MBX-224 is the Sony board used in the VPCEB-series notebooks. Write the image to the SPI flash with a programmer such as a CH341A when the BIOS is corrupted. First confirm the MBX label on the board, save the original dump, and make sure the file size matches the chip capacity.
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 →