THINKPAD_L490_FL490_FL590_NM_B931_REV_1_0_2019_03_15_3MB_&_1MB_BIOS.rar

TXTAbout THINKPAD L490 FL490 FL590 NM-B931 REV 1 0 2019 03 15 3MB & 1MB BIOS BIOS / EC firmware

THINKPAD L490 FL490 FL590 NM-B931 REV 1 0 2019 03 15 3MB & 1MB BIOS is a Lenovo L490 / FL490 / FL590 BIOS / EC firmware dump for board NM-B931 (3 MB) — tested. It is packed in a RAR archive of 12.9 MB, board revision 1. It was first posted on 22 Feb 2025 and is available in 2 Telegram channels.

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-B931 revision 1.

For the same board you can also find a schematic and a boardview — see all NM-B931 files.

MSGFrom the Telegram post

THINKPAD L490 FL490 FL590 NM-B931 REV 1.0 2019-03-15 3MB & 1MB BIOS OKOKOKOK TESTED OK 100%

J1Download NM-B931 BIOS / EC firmware from Telegram

R1How to download THINKPAD L490 FL490 FL590 NM-B931 REV 1 0 2019 03 15 3MB & 1MB BIOS

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_L490_FL490_FL590_NM_B931_REV_1_0_2019_03_15_3MB_&_1MB_BIOS.rar to download it.
3. Open it with 7-Zip (free) or WinRAR.

If a post was deleted, try another source above or search for NM-B931. 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.

.RARWhat is a .rar file and how to open it?