Lenovo IH61M board BIOS, version 4.2, in a 2.80 MB RAR archive marked as working (OK). The IH61M code indicates a desktop board based on the Intel H61 chipset. A working-status note helps, but verify that the version 4.2 marking on the PCB matches before programming, since IH61M boards exist in several versions. Dump the original SPI flash as a backup, then write the image with a hardware programmer such as a CH341A, checking that the file size and chip capacity agree.
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 →