Lenovo BIOS image for board IB460CX, revision 1.0, marked OK in the name to show it was reported working, 32.0 MB in size. The size matches a 256 Mbit SPI flash chip, so check the chip capacity before programming. Read and keep a backup of the original contents with a CH341A or similar programmer, then write and verify. Confirm the IB460CX marking and revision on your board, and expect to restore serial and system identification data afterwards.
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 @ShareMan_Electronic_Files. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →