BIOS image for the ZX-H61C desktop board, version 2.3, marked as fully working, packaged in a 3.62 MB RAR. The name gives no brand or chipset variant beyond the H61C model code, so compare it with the B75 variant file to pick the right one for your board. Use an SPI programmer to rewrite the flash chip when the board fails to post. Back up the existing contents first and confirm the image length fits the installed chip before writing.
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 →