Firmware dump for the Sony VAIO board MBX-223, described in the name as tested OK, packed as a 1.67 MB RAR. Sony uses MBX codes to identify its VAIO mainboards, and the code is printed on the PCB, so confirm it there. The image can be written with an external SPI programmer to bring back a board that will not start after a failed update. Save a read of the existing chip before writing, and check that the dump size matches the capacity of the flash on your board.
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 →