Firmware archive for the Dell Vostro 2520, labelled DV15 MLK MB, packed as a 3.05 MB rar file. DV15 MLK appears to be the motherboard project marking, but no revision or ME status is stated, so inspect the archive contents before use. Such a dump is normally programmed into the SPI BIOS chip with a hardware programmer when the laptop does not POST. Compare the marking silkscreened on your board, keep a backup of the original chip read, and make sure the extracted image matches the flash chip size.
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 @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →