BIOS dump for the Lenovo ThinkPad E480 and E580 built on the NM-B421 motherboard, packed as a RAR archive of 4.71 MB. The name marks the image as having its Intel Management Engine region cleared, so it can be written to a board without carrying over another machine's ME state. NM-B421 follows the LCFC numbering used for Lenovo boards. Confirm the PCB label matches, read and save the original SPI flash contents with a programmer first, and check the image size against the chip capacity before writing.
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 | 31 Mar 2021 | Open file on RM Schematics |
| @Satale_bios_esquemas_Laptop | 31 Mar 2021 | 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 →