BIOS dump for the Dell OptiPlex 7070 desktop, board number 17509-3, stored in an 8.40 MB RAR archive. The name says the image is for a 32MB flash and was tested working. The 17509 style of number follows the Wistron numbering pattern, Wistron being the ODM behind many Dell boards. Use it to reflash the SPI chip with a programmer such as a CH341A when the original firmware is corrupted. Read and save the existing chip contents first, and check that the chip capacity matches the image.
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 →