EE480 EE580 NM-B421 REV 1.0 2017-10-30 BIOS 7 KBEC OKOK
This post is marked VIP / paid in its channel: the file may need a purchase or VIP membership from the channel owner.
Uploader's description
EE480 EE580 NM-B421 REV 1.0 2017-10-30 BIOS 7 KBEC OKOK
What the file name tells us
| Brand | Lenovo |
|---|---|
| Board | NM-B421 |
| ODM | LCFC |
| Revision | 1.0 |
| Kind | BIOS, EC |
| Format | .zip |
| Date in file name | 2017-10-30 |
| Archive size | 7.3 MB |
| First posted | 2025-07-08 |
| Channel | BIOS Archive |
| Notes | tested by uploader, VIP / paid post |
Parsed automatically from the file name and caption. Always compare the board number with the one printed on your board.
What this kind of file is for
A BIOS dump is a full image of the board's SPI flash chip. It is written back with an SPI programmer when the original firmware is corrupted, after a chip replacement, or to recover from a failed update. Read and save the original chip first: serial number, DMI data and the Intel ME / AMD PSP state differ between boards.
EC (embedded controller) firmware runs the keyboard controller, power sequencing, battery charging and fans. Depending on the board it lives in a separate chip (ENE KB9012, ITE IT85xx, Nuvoton NPCE) or inside the main SPI image, so check which applies before flashing.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .zip | ZIP archive | 7-Zip, WinRAR or the built-in Windows extractor |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |