NM-B901 – Lenovo ThinkPad FT490
NM-B901 is the LCFC main board used in the Lenovo ThinkPad FT490, Lenovo ThinkPad FT492, Lenovo ThinkPad T490 and Lenovo ThinkPad T590. 14 files are indexed for this board: 10 BIOS files, 2 schematics, 1 boardview and 2 EC firmware images.
Revisions seen in file names: 1.0 and 0.3. The BIOS dumps are 32 MB images. ODM project names: FT590 and FP531. The earliest file dates from March 2021 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 10
Schematics 2
Boardviews 1
EC / KBC firmware 1
From the uploader
LENOVO T590 FT490 FT492 FT590 FP531 NM-B901 REV 1.0 2018-12-29 N17S-G2-A1 SREJP CPU i7-8565U WORKING 100%
LENOVO THINKPAD T490 T590 FT490 FT492 FT590 FP531 NM-B901 REV 1.0 DREJP i7-8565U N17S-G2-A1 MEC1663
Board facts
| Board number | NM-B901 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-B |
| ODM project | FT590, FP531 |
| Revisions | 1.0, 0.3 |
| BIOS chip size | 32 MB |
| Flash chip | W25Q256FV |
| EC / KBC chip | MEC1663 |
| CPU generation | Intel 8th gen |
| First seen | 2021-03-06 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics |
| About the number | LCFC is Lenovo's joint venture with Compal; its main boards use NM- numbers and sub-boards NS- numbers. |
Laptops that use NM-B901
- Lenovo ThinkPad FT490
- Lenovo ThinkPad FT492
- Lenovo ThinkPad T490
- Lenovo ThinkPad T590
What these files are 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.
A schematic is the circuit diagram of the main board: power rails, power-up sequence, component values and net names. It is the reference for measuring voltages and tracing a fault.
A boardview is the component placement map of the PCB: click a part or a net and the viewer highlights where it is and what it connects to. Used together with the schematic to find test points.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .bdv | Honhan .bdv boardview | OpenBoardView, FlexBV or Honhan BoardViewer |
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .rar | RAR archive | 7-Zip or WinRAR |
| .tvw | Tebo-ICT .tvw boardview | FlexBV or Tebo-ICT View |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Who designed the NM-B901 board?
NM-B901 is an LCFC board number used by Lenovo.
Is there a boardview for NM-B901?
Yes, 1 boardview file in .bdv and .tvw format.
What BIOS chip size does NM-B901 use?
The BIOS images for NM-B901 are 32 MB. Flash chips named in the files: W25Q256FV.
Which laptops use the NM-B901 board?
Files in the catalog link NM-B901 to the Lenovo ThinkPad FT490, Lenovo ThinkPad FT492, Lenovo ThinkPad T490 and Lenovo ThinkPad T590.
Where do the download links go?
Each button opens the original public Telegram post the file was shared in. ChambersDesignInc.com only indexes and cross-references those posts.