A BIOS image for the Dell Inspiron 14z-5423, labelled DMB40, which is probably the board codename. The file is 8 MB, matching a 64 Mbit SPI flash, and the name gives no version or ME status. Repair shops write such dumps with an external programmer to fix boards that power on but show no picture because of corrupted firmware. Compare the DMB40 marking and the chip capacity on your board, and save the original contents before erasing, since service tag data lives 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 @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 →