Backup BIOS dump for a Y50 notebook built on the LA-B111P board, supplied as a 3.33 MB RAR archive; the Bk Up tag indicates a read taken from a working chip. LA-B111P follows the Compal numbering pattern, so the board maker is Compal rather than the laptop brand. Technicians use such a dump to restore a corrupted SPI flash with a programmer such as a CH341A. Check the board number printed on the PCB, back up the existing chip before writing, and confirm the extracted image matches the chip 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 .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 →