BIOS image for a Lenovo-style B470E notebook on board LA47, marked MB 10250-4 with board part number 48.4KZ01.021, delivered as a ZIP of 2.34 MB holding a bin file. The 10250 and 48.4 codes follow the Wistron labelling pattern, with the dash suffix and trailing digits identifying the PCB revision, so check these against the sticker or silkscreen. Technicians flash such dumps directly to the SPI chip with a programmer to recover dead or looping boards, keeping a copy of the original chip first.
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 .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 →