Sony VAIO BIOS archive listing two boards, MBX-204 and MBX-217, along with the code M851, which is likely a related board or platform identifier. The RAR is 864 KB. MBX numbers are Sony's internal motherboard designations, so the PCB marking is the reliable way to confirm a match. Repairers use the dump to reflash the BIOS chip with a programmer to recover a dead or locked machine. Read and keep the original chip contents, and check the image size against the flash capacity.
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.
All sources (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 8 Nov 2017 | Open file on RM Schematics |
| @abgm_manutencao_bios | 8 Aug 2019 | Open file on RM Schematics |
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 →