Lenovo BIOS image for the board marked BM6G28, revision 1.0, intended for an 8 MB flash chip according to the name. The RAR contains a dump that can be written with an external SPI programmer to restore a machine that fails to start after a bad update or chip corruption. Before flashing, confirm the board marking and revision on the PCB, identify the chip and confirm it is 8 MB so the image fits, and read out the original contents as a backup, since serial and system data live in the existing chip.
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 →