Lenovo BIOS for the M3A780M board, version 1.0, in the 1M variant, most likely a 1MB image for boards fitted with the smaller flash chip; a 2M version exists separately. Archived as RAR. Check the marking on the SPI chip to confirm its capacity before choosing this file, since a mismatched image will not fit. Always dump and keep the original contents with a programmer before writing, then verify after programming.
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 →