BIOS archive for a Sony mini laptop identified by model code PCG-21313M, delivered as a 908 KB RAR. The name gives no board number, revision or version, so the PCG model code on the bottom label is the only reference for matching. Technicians flash this kind of image onto the SPI chip with an external programmer when a VAIO netbook will not boot or is stuck on a password. Open the archive, check that the image size equals the chip capacity, and save a full read of the original chip before any write.
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 →