NM-B321 – Lenovo IdeaPad DG425
The NM-B321 (LCFC) motherboard is found in the Lenovo IdeaPad DG425, Lenovo IdeaPad DG525, Lenovo IdeaPad 320 14IKB and Lenovo IdeaPad 320-15AST. The catalog lists 18 files for it: 15 BIOS files, 2 schematics, 1 boardview and 1 EC firmware image.
Revisions seen in file names: 1.0 and 0.2. ODM project names: DG525, DG725 and DG425. First posted in April 2019 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 15
Schematics 2
Boardviews 1
From the uploader
LENOVO 320-15ACL DG425 DG525 DG725 NM-B321 REV 0.2 2017-01-11 CPU A6-9220 R4AMD
Board facts
| Board number | NM-B321 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-B |
| ODM project | DG525, DG725, DG425 |
| Revisions | 1.0, 0.2 |
| EC / KBC chip | IT8586E |
| CPU generation | Intel 7th gen |
| First seen | 2019-04-07 |
| 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-B321
- Lenovo IdeaPad DG425
- Lenovo IdeaPad DG525
- Lenovo IdeaPad 320 14IKB
- Lenovo IdeaPad 320-15AST
- Lenovo 320 15ACL
- Lenovo 330-15AST
- Lenovo IdeaPad 320
- Lenovo IdeaPad 320-15AST 80XV
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 |
| .rar | RAR archive | 7-Zip or WinRAR |
| .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
Which laptops use the NM-B321 board?
Files in the catalog link NM-B321 to the Lenovo IdeaPad DG425, Lenovo IdeaPad DG525, Lenovo IdeaPad 320 14IKB, Lenovo IdeaPad 320-15AST, Lenovo 320 15ACL, Lenovo 330-15AST, Lenovo IdeaPad 320 and Lenovo IdeaPad 320-15AST 80XV.
Is there a boardview for NM-B321?
Yes, 1 boardview file in .bdv format.
Who designed the NM-B321 board?
NM-B321 is an LCFC board number used by Lenovo.
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.