BIOS image for the Dell Vostro 3670 desktop, board 18457-1, with NKG71SFA also given in the name, possibly a board or project reference, in a 7.87 MB RAR. Numbers in the five-digit-dash format are typical of Wistron-designed Dell boards. Technicians reflash the SPI chip with a programmer to fix boot failures caused by a bad firmware update or corruption. Back up the existing chip contents first and verify that the image size equals the flash capacity, otherwise it will not fit or boot.
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 →