E480 EE580 NM-B421 REV 1.0 2017-10-30 BIOS & EC
BIOSEC
5.2 MB · first posted in BIOS Archive
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E480 EE580 NM-B421 REV 1.0 2017-10-30 BIOS & EC
What the file name tells us
| Brand | Lenovo |
|---|---|
| Board | NM-B421 |
| ODM | LCFC |
| Revision | 1.0 |
| Kind | BIOS, EC |
| Format | .rar |
| Date in file name | 2017-10-30 |
| Archive size | 5.2 MB |
| First posted | 2025-07-07 |
| Channel | BIOS Archive |
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 |
|---|---|---|
| .rar | RAR archive | 7-Zip or WinRAR |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Other files for NM-B421
FileSizeRevAddedSource
Thinkpad E580 LCFC NM-B421 BoardView PDF
SchematicBoardview.pdf
228 KB
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LENOVO E480 - NM-B421 Rev1.0 BoardView (BDV)(.TVW)
Boardview.bdv.tvw
1.5 MB
1.0
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EE480 EE580 NM-B421 REV 1.0 2017-10-30 BIOS 7 KBEC OKOK
BIOSECTestedVIP
7.3 MB
1.0
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LENOVO E480 - NM-B421 Rev1.0 BoardView (BDV)(.TVW)
Boardview.bdv.tvw
3.7 MB
1.0
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