BIOS archive for the ASUS X421UA laptop, board revision 2.0, with the name flagging an AMD variant. At 17.5 MB the RAR may contain more than one image or supporting files, so inspect its contents before use. A dump like this is normally written to the SPI flash chip with a CH341A-type programmer when a board has corrupted firmware, no POST or a failed update. Match the revision printed on the PCB and the chip capacity to the image, and always read and store the original chip contents before erasing.
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 →