BIOS firmware archive for the Dell Inspiron 3521 (spelled inpirion in the name), 3.04 MB in 7z format. No board number, revision or version is given, so check the contents and identify the motherboard of the unit before writing anything. Such dumps are typically flashed to the SPI chip with a hardware programmer when the laptop will not POST after a failed update or corrupted firmware. Always read and keep a copy of the existing chip, since it holds the service tag and other machine data, and confirm that the dump size equals the chip capacity.
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 .7z file
High-ratio compressed archive, often used for large BIOS collections.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →