NM-A581 – Lenovo ThinkPad T460
The Lenovo ThinkPad T460, Lenovo ThinkPad T450, Lenovo ThinkPad T460R and Lenovo ThinkPad T460S are built on the NM-A581 board designed by LCFC. The catalog lists 14 files for it: 10 BIOS files, 2 schematics and 2 boardviews.
Revisions seen in file names: 3.0, 2.0, 0.1 and 1.0. ODM project name: BT462. The earliest file dates from April 2019 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 10
Schematics 2
Boardviews 2
Board facts
| Board number | NM-A581 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | BT462 |
| Revisions | 3.0, 2.0, 0.1, 1.0 |
| First seen | 2019-04-06 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics, Laptop & Desktop BIOS Files |
| 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-A581
- Lenovo ThinkPad T460
- Lenovo ThinkPad T450
- Lenovo ThinkPad T460R
- Lenovo ThinkPad T460S
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 |
| .bin | raw SPI flash image | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
| 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 |
| .zip | ZIP archive | 7-Zip, WinRAR or the built-in Windows extractor |
Questions
Who designed the NM-A581 board?
NM-A581 is an LCFC board number used by Lenovo.
Is there a boardview for NM-A581?
Yes, 2 boardview files in .bdv and .tvw format.
Which laptops use the NM-A581 board?
Files in the catalog link NM-A581 to the Lenovo ThinkPad T460, Lenovo ThinkPad T450, Lenovo ThinkPad T460R and Lenovo ThinkPad T460S.
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.