BIOS archive for the ASUS X421JA laptop, board revision 2.1, labelled as tested and confirmed good. Extract the RAR and flash the image to the SPI chip with a programmer when the machine fails to boot because of corrupted firmware. Before writing, read the original chip and keep a copy, since it may hold serial and system data. Also confirm the image size matches the chip capacity and that the board revision on the PCB is 2.1.
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.
All sources (3)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 12 Mar 2024 | Open file on RM Schematics |
| @generalbios | 14 Jul 2024 | Open file on RM Schematics |
| @generalbios | 4 Nov 2024 | Open file on RM Schematics |
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 →