BIOS dump for the Lenovo ThinkPad E480 and E580 range, also listed as EE480 and EE580, on the NM-B421 board revision 1.0. The NM-xxxx pattern is LCFC's numbering, the Lenovo-affiliated ODM behind many ThinkPad mainboards. The 4.66 MB RAR is meant for SPI programming on a board with corrupted firmware. Verify NM-B421 on the PCB, back up the original chip, since ThinkPad images hold serial and other system data, and check that the dump size matches the chip.
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 | 5 Jan 2021 | Open file on RM Schematics |
| @biositechyangiyer | 1 Feb 2021 | Open file on RM Schematics |
| @BiosSchematicWorld | 4 Feb 2022 | Open file on RM Schematics |
| @pepeelectronica | 27 Apr 2022 | Open file on RM Schematics |
| @biosdumpcomputer | 26 May 2022 | Open file on RM Schematics |
| @schematics_bios | 27 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 3 Aug 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 →