Raw BIOS binary for a Sony VAIO mainboard MBX-202, with M791 given as the related model or board code, size 2.00 MB. MBX numbers are the Sony board identifiers printed on VAIO mainboards. A 2 MB raw image matches a 16 Mbit SPI flash chip, and can be written directly with a programmer such as a CH341A to revive a board with corrupted firmware. Confirm the MBX number and the chip capacity on your board, and read and keep the existing contents before erasing.
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 @bioshub. 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 →