Backup BIOS read from a Lenovo MTQ45NK desktop motherboard, stored as a 2.08 MB RAR archive. As a backup, it is most likely a full dump taken from a working board, which can include machine-specific data such as serial numbers and the MAC address. It is useful for reprogramming a corrupted SPI chip on the same board model. Check the board label against MTQ45NK, save your own chip contents first, and make sure the extracted image matches the flash capacity 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 @afsbiosfree. 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 →