BIOS image for the Toshiba Satellite C640D on mainboard 6050A2357601-MB-A02, where A02 is the board revision. Numbers that start with 6050A belong to Inventec, the ODM that built many Toshiba notebooks. The 993 KB zip should contain a dump for the SPI flash, used to recover a board after a failed update or a corrupted chip. Compare the 6050A number and revision printed on the PCB with this one, back up the existing chip contents, and confirm the file size suits the flash capacity before programming it.
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 .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →