Working BIOS dump for a Dell laptop built on Wistron board 17831-1, a 16 MB file without extension. Wistron is one of the ODMs that design and build Dell notebook boards, and the number printed on the PCB identifies the matching firmware. The 16 MB size matches a 128 Mbit SPI flash chip. Program it with an external tool when the system will not post because of corrupted firmware. Read the original chip first, because Dell stores the service tag and other system data in the flash.
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 @schematiclaptopramkushwaha. Enginerys does not host this file.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →