BIOS package for the Lenovo C225 all-in-one, linked to board DA0QUDMB6D0, a Quanta number. Quanta encodes its boards as DA0 plus project code plus MB and revision characters, so the trailing letters identify the PCB version and should be compared with the board itself. The 3.10 MB RAR has to be unpacked to find the actual image. Before programming the SPI chip, dump and keep the original contents, then verify the image size matches the chip capacity so the write completes correctly.
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 →