NM-A301 – Lenovo ThinkPad T450S
NM-A301 is the LCFC main board used in the Lenovo ThinkPad T450S and Lenovo ThinkPad T440S. ChambersDesignInc.com has indexed 12 files for this board — 7 BIOS files, 2 schematics and 3 boardviews.
Revisions seen in file names: 1.0. The BIOS dumps are 16 MB images. ODM project name: AIMT1. First posted in February 2021 in BIOS Archive, Cyberlan Electronics and Schematics & Boardviews Archive.
BIOS dumps 7
Schematics 2
Boardviews 3
Board facts
| Board number | NM-A301 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | AIMT1 |
| Revisions | 1.0 |
| BIOS chip size | 16 MB |
| Flash chip | W25Q128BV |
| Graphics | UMA (integrated) |
| First seen | 2021-02-06 |
| Source channels | BIOS Archive, Cyberlan Electronics, Schematics & Boardviews Archive, Boardview Schematics |
| 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-A301
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 |
| .zip | ZIP archive | 7-Zip, WinRAR or the built-in Windows extractor |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Who designed the NM-A301 board?
NM-A301 is an LCFC board number used by Lenovo.
What BIOS chip size does NM-A301 use?
The BIOS images for NM-A301 are 16 MB. Flash chips named in the files: W25Q128BV.
Which laptops use the NM-A301 board?
Files in the catalog link NM-A301 to the Lenovo ThinkPad T450S and Lenovo ThinkPad T440S.
Is there a boardview for NM-A301?
Yes, 3 boardview files in .bdv and .tvw format.
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.