Firmware dump for a Lenovo 5000-series laptop on the NM-B244 board, revision 1.0, listing the DG42A and DG52A platform codes, which suggests 14 and 15 inch variants share the board. NM-xxxx numbers come from LCFC, Lenovo's in-house ODM. The 5.12 MB RAR should contain an SPI image for reflashing with a programmer when the BIOS is corrupted. Confirm the NM-B244 marking and revision on the PCB, keep a backup of the original chip, and make sure the image matches the flash capacity.
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 | 25 Mar 2019 | Open file on RM Schematics |
| @IT_SERVICE_WORLD | 28 Oct 2019 | 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 →