Working BIOS for a ZX-H61C desktop motherboard version 2.3 in a B75 variant, described as fully working, archived at 3.74 MB. No brand is given, so identify the board carefully by its silkscreen and chipset markings. Such images are written to the SPI flash with a programmer like a CH341A to recover a board with corrupted firmware. Read and save the original chip first, make sure the board really uses the B75 chipset version, and check the image size matches the flash capacity.
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 →