Zip archive for the IH61M motherboard at revision 1.0, about 2.13 MB. It covers an earlier revision than other IH61M packages, and boards of this name differ between revisions, so matching the marking on the PCB is essential. The name does not list contents; most likely a BIOS image for the SPI flash. Use a programmer to read and save the existing chip, check that the dump size fits the chip, and verify after writing before reassembling the system.
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 @laptopchiplevelrepair. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip