An ASUS BIOS image for the Y4200F and X409FB laptop board revision 2.0, packed as RAR and described in the name as fully working. Use it to recover laptops that power on without display or hang at boot because of corrupted SPI flash contents. Write it with an external programmer after reading and saving the existing chip data. ASUS models often share one mainboard, so compare the revision silkscreened on the PCB before flashing and confirm the image size equals the chip 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 →