BIOS for a board marked LK21 with mainboard number 14297-3M, sized for a 16MB flash chip. The five-digit number with a dash suffix follows the Wistron pattern, where the suffix normally indicates the revision; no brand is given. The image is meant for SPI reprogramming when the laptop does not boot or lost its firmware. Read and back up the existing chip before writing, confirm it is a 16MB part, and verify the board number and suffix on the PCB.
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 →