Firmware image for the Sony VAIO MBX-250 motherboard, a 4.00 MB binary sized for a 32 Mbit SPI flash. No BIOS version or board revision is stated in the name. Sony labels its VAIO laptop mainboards with MBX numbers, which can be read from the PCB silkscreen or a sticker. Technicians use such a dump to restore boards with corrupted BIOS that fail to start. Read and keep the existing chip contents before writing, and confirm the chip size matches the image.
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 @bios_laptop. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →