NM-B421 EC / KBC Firmware

Part of NM-B421

NM-B421: 2 EC firmwares found in the source channels. The board is used in the Lenovo ThinkPad E480, Lenovo ThinkPad E580 and Lenovo ThinkPad R480. Board revisions: 1.0. 1 is a VIP/paid post in the source channel.

EC files 2

FileSizeRevAddedSource
EE480 EE580 NM-B421 REV 1.0 2017-10-30 BIOS 7 KBEC OKOK
BIOSECTestedVIP
7.3 MB
1.0
Get on Telegram BIOS Archive
E480 EE580 NM-B421 REV 1.0 2017-10-30 BIOS & EC
BIOSEC
5.2 MB
1.0
Get on Telegram BIOS Archive

Laptops that use NM-B421

  • Lenovo ThinkPad E480
  • Lenovo ThinkPad E580
  • Lenovo ThinkPad R480

What these files are for

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

FormatWhat it isOpen with
.rarRAR archive7-Zip or WinRAR
.zipZIP archive7-Zip, WinRAR or the built-in Windows extractor