THINKPAD_E480_EE480_EE580_NM_B421_REV_1_0_2017_10_30_AMD_216_0905004.zip

TXTAbout THINKPAD E480 EE480 EE580 NM-B421 REV 1 0 2017 10 30 AMD 216 0905004 BIOS / EC firmware

THINKPAD E480 EE480 EE580 NM-B421 REV 1 0 2017 10 30 AMD 216 0905004 is a Lenovo E480 / EE480 / EE580 BIOS / EC firmware dump for board NM-B421 — tested. It is packed in a ZIP archive of 8.0 MB, board revision 1. It was first posted on 8 Jul 2025 and is available in 1 Telegram channel.

Write it with an SPI programmer such as CH341A, RT809H or XGecu T48 to revive a board after a failed BIOS update, fix a corrupted Intel ME region or remove a forgotten BIOS password. Read and save the original chip first, and check that your board is NM-B421 revision 1.

For the same board you can also find a boardview and a schematic — see all NM-B421 files.

MSGFrom the Telegram post

THINKPAD E480 EE480 EE580 NM-B421 REV 1.0 2017-10-30 AMD 216-0905004 OKOKOKOK TESTED OK 100%

J1Download NM-B421 BIOS / EC firmware from Telegram

R1How to download THINKPAD E480 EE480 EE580 NM-B421 REV 1 0 2017 10 30 AMD 216 0905004

1. Press Download in Telegram. The post opens in the Telegram app, or on a t.me preview page — choose “View in Telegram”.
2. You don’t need to join the channel. Tap the file THINKPAD_E480_EE480_EE580_NM_B421_REV_1_0_2017_10_30_AMD_216_0905004.zip to download it.
3. Open it with Built into Windows and macOS or 7-Zip (free).

If a post was deleted, try another source above or search for NM-B421. Step-by-step help: downloading from Telegram.

Back up the original chip twice before writing this dump, and check that the board number and chip size match. See how to flash a BIOS chip.

.ZIPWhat is a .zip file and how to open it?