ASUS S400CA BIOS dump for main board revision 3.1, where U2801 appears to mark the flash chip position on the board, packed as a 3.66 MB RAR. It is used to reprogram that SPI chip with an external programmer when the laptop is dead, shows no picture or has corrupted firmware. Locate the chip at the stated reference, confirm the board revision matches, and read the original contents before erasing. Check that the extracted image size equals 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.
All sources (7)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 24 Dec 2019 | Open file on RM Schematics |
| @laptexlaptopbios | 9 Jul 2020 | Open file on RM Schematics |
| @one5technology | 21 Nov 2020 | Open file on RM Schematics |
| @pepeelectronica | 23 Apr 2022 | Open file on RM Schematics |
| @skclappybios | 10 Apr 2024 | Open file on RM Schematics |
| @schematics_bios | 24 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 31 Jul 2026 | 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 →