Firmware dump for the Sony VAIO VGN-NS11S notebook with board MBX-195, marked as new in the name, archived as an 831 KB RAR. MBX is Sony's internal motherboard numbering. Such an image is programmed onto the BIOS flash chip with an external programmer when the laptop powers on without picture or fails POST. The new label may mean a clean or updated image, but this is not documented. Back up the existing chip contents, compare the size with the chip capacity, and confirm the board number on the PCB.
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 →