NM-C631 – Lenovo ThinkPad L14 Gen 1
NM-C631 is the LCFC main board used in the Lenovo ThinkPad L14 Gen 1, Lenovo ThinkPad GL40 and Lenovo ThinkPad GL40-GL5A0. The catalog lists 6 files for it: 3 BIOS files, 2 schematics, 2 boardviews and 1 EC firmware image.
Revisions seen in file names: 1.0 and 0.1. The earliest file dates from June 2022 (Schematics & Boardviews Archive, BIOS Archive and Cyberlan Electronics).
BIOS dumps 3
Schematics 2
Boardviews 1
Board facts
| Board number | NM-C631 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-C |
| Revisions | 1.0, 0.1 |
| CPU generation | Intel 10th gen |
| First seen | 2022-06-20 |
| Source channels | Schematics & Boardviews Archive, BIOS 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-C631
- Lenovo ThinkPad L14 Gen 1
- Lenovo ThinkPad GL40
- Lenovo ThinkPad GL40-GL5A0
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 |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Who designed the NM-C631 board?
NM-C631 is an LCFC board number used by Lenovo.
Which laptops use the NM-C631 board?
Files in the catalog link NM-C631 to the Lenovo ThinkPad L14 Gen 1, Lenovo ThinkPad GL40 and Lenovo ThinkPad GL40-GL5A0.
Is there a boardview for NM-C631?
Yes, 2 boardview files in .bdv 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.