BIOS image for the Dell Inspiron 14Z-5423, with DMB40 in the name, which appears to be the board or project code for that model. The 8 MB size corresponds to a 64 Mbit SPI flash. This kind of dump is used to revive a laptop that will not post or that was bricked by a failed update, written with an external programmer. The (1) suffix hints at a duplicate copy. Match the board marking first and keep a backup of the original chip, since it carries the service tag and system data.
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 @biosfilebins. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →