NM-C421 – Lenovo ThinkPad S3 Gen 2
The NM-C421 (LCFC) motherboard is found in the Lenovo ThinkPad S3 Gen 2. ChambersDesignInc.com has indexed 12 files for this board — 9 BIOS files, 2 schematics, 1 boardview and 2 EC firmware images.
Revisions seen in file names: 1.0. BIOS images are 16 MB. First posted in April 2021 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 9
Schematics 2
Boardviews 1
From the uploader
FE4A0 FE5A0 NM-C421 REV 1.0 SRGKY CPU I5-10210U 2019-07-05 BIOS & KBEC
FE4A0 FE5A0 NM-C421 REV 1.0 2019-07-05 i5 SRGKY i5-10210U 216-0923010
Board facts
| Board number | NM-C421 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-C |
| Revisions | 1.0 |
| BIOS chip size | 16 MB |
| Flash chip | MX25L12872F, W25Q128 |
| CPU generation | Intel 10th gen |
| First seen | 2021-04-14 |
| 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-C421
- Lenovo ThinkPad S3 Gen 2
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
Is there a boardview for NM-C421?
Yes, 1 boardview file in .bdv and .tvw format.
Who designed the NM-C421 board?
NM-C421 is an LCFC board number used by Lenovo.
What BIOS chip size does NM-C421 use?
The BIOS images for NM-C421 are 16 MB. Flash chips named in the files: MX25L12872F and W25Q128.
Which laptops use the NM-C421 board?
Files in the catalog link NM-C421 to the Lenovo ThinkPad S3 Gen 2.
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.