Shared BIOS archive for the EA53-BM and EG52-BM projects, both on Wistron board 14222-1 with code 03708. The two codes suggest one PCB used across related models. The 14222-1 number follows Wistron numbering, so the board ID matters more than the laptop label when choosing firmware. Unpack the 2.75 MB RAR and confirm that the image size suits the SPI chip. Back up the original contents, since they may hold serial and system data, before programming with a flasher.
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 (2)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 23 Mar 2021 | Open file on RM Schematics |
| @laptopchiplevelexpert | 5 Aug 2022 | 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 →