BIOS dump for the Lenovo ThinkPad L540, taken from a Wistron-designed mainboard numbered 12290-1M. The name identifies the flash chip as a Macronix MX25L6473E, a 64 Mbit (8 MB) SPI part, and the image is packed in a 3.50 MB zip archive. Technicians use such a dump to reflash a corrupted chip with an SPI programmer such as a CH341A. Confirm the board number printed on the PCB, read and save the original chip contents first, and check the extracted image is exactly 8 MB before writing.
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 →