BIOS image for the B40-70 laptop, a Lenovo model name, built on Compal board LA-B091P; the ZIP archive is 3.39 MB. No version or revision is stated in the name. It is used to recover a corrupted SPI flash on a unit that powers on without display or fails after an update, using an external programmer. Because the LA-B091P design is shared across several models, confirm the model and board number match, keep a backup of the original chip, and check the image 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 .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 →