BIOS firmware package for a mainboard labelled H0225-3 with the part code 48.4KH17.031 and the LDB-1 MB designation, supplied as a 5.33 MB zip archive. The 48.4xxxx.0xx style code is the PCB part number printed on many Wistron-made boards, so read it off the silkscreen and compare before using the dump. Extract the image, check that its size equals the capacity of the SPI flash chip on the board, save a backup of the original chip contents with your programmer, and only then write the new image..
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 .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →