BIOS files for the Sony VAIO M721 and M720 netbooks using the Sony MBX-182 motherboard, packed into a small 587 KB RAR. Sony labels its VAIO mainboards with MBX numbers, which are printed on the PCB and should be compared before use. A technician would load this image into an SPI programmer to restore a unit that powers on without display or hangs at boot. Read the existing chip first and keep that copy, then check that the dump size corresponds to the flash capacity, because a mismatched image will not fit.
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 →