Firmware package for the Dell Inspiron 14z 5423, with the label DMB40 taken from the name, which is the board designation Dell uses for this ultrabook family. The 3.73 MB zip contains the BIOS image to be written to the mainboard SPI flash. It is useful when a corrupted BIOS leaves the machine dead or stuck in a reboot loop. Read and keep the original chip contents first, check that the image size matches the chip capacity, and compare the PCB markings before programming.
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 @bios_laptop. Enginerys does not host this file.
All sources (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @bios_laptop | 15 Jun 2022 | Open file on RM Schematics |
| @Satale_bios_esquemas_Laptop | 27 May 2023 | Open file on RM Schematics |
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →