Firmware set for Dell Latitude E5450 laptops using the ZAM70 Compal motherboard LA-A901P, revision 1.0 A00. As the 8MB+4MB note suggests, the board carries two SPI flash chips, and this archive is slightly smaller than another copy of the same name, so compare contents before use. Unpack it and flash each image to the matching chip with an external programmer when the machine fails to POST. Back up the factory dumps beforehand, since they hold service tag and system data, and check that file sizes equal the chip capacities.
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 @biosfiles. Enginerys does not host this file.
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 →