Backup BIOS image marked OK for a Lenovo board BMWC1-C2, number NM-A471 revision 2.0, in a 3.50 MB rar archive. The NM prefix indicates LCFC numbering, the Lenovo-owned ODM. Being labelled as a working backup, it suits recovery of boards whose flash got corrupted. The laptop model is not named, so identify the board by the NM number and revision on the PCB. Program it with an SPI programmer such as a CH341A, after saving the current chip contents and checking the dump size matches the flash.
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 | 13 Apr 2019 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 28 Oct 2019 | Open file on RM Schematics |
| @one5technology | 10 Nov 2020 | 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 →