BIOS archive for the Lenovo ThinkPad L13, project Lar-1, on the Wistron 18834-1M motherboard. At 16.4 MB the RAR probably contains a full SPI image, and possibly extra files. Wistron produces many ThinkPad boards under this numbering scheme. Use it to reprogram the flash chip with an external programmer after corruption. ThinkPads store serial and machine-type data in the BIOS, so save the original dump first and check that the 18834-1M marking matches.
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 →