BIOS dump for the Lenovo ThinkPad L13 Gen 2 (named IBM in the title), board 19837-1, reported as fully working and packed in a 21.0 MB RAR. The 19837-1 number follows Wistron numbering, the ODM manufacturing this ThinkPad mainboard. A tested image like this is used to restore a board with corrupted firmware by writing the SPI flash with a programmer such as a CH341A or similar. Save the original chip contents first, since serial and key data are board-specific, and check the image size matches the flash chip.
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 @Laptopbiossolutions. 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 →