NM-C921 – Lenovo Legion Y7000
NM-C921 is the LCFC main board used in the Lenovo Legion Y7000. 5 files are indexed for this board: 2 BIOS files, 1 schematic and 2 boardviews.
Revisions seen in file names: 1.0 and 0.4. The BIOS dumps are 16 MB images. First posted in February 2022 in Cyberlan Electronics, Schematics & Boardviews Archive and BIOS Archive.
BIOS dumps 2
Schematics 1
Boardviews 2
From the uploader
LENOVO Y7000 2020 NM-C921 Rev 1.0 SRH8Q SRJAU N18P-G61-MP2-A1 BIOS UH3 16MB_W25Q128JVSQ
Board facts
| Board number | NM-C921 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-C |
| Revisions | 1.0, 0.4 |
| BIOS chip size | 16 MB |
| Flash chip | W25Q128JVSQ |
| First seen | 2022-02-06 |
| Source channels | Cyberlan Electronics, Schematics & Boardviews Archive, BIOS 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-C921
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 |
| .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
What BIOS chip size does NM-C921 use?
The BIOS images for NM-C921 are 16 MB. Flash chips named in the files: W25Q128JVSQ.
Who designed the NM-C921 board?
NM-C921 is an LCFC board number used by Lenovo.
Is there a boardview for NM-C921?
Yes, 2 boardview files in .bdv and .tvw format.
Which laptops use the NM-C921 board?
Files in the catalog link NM-C921 to the Lenovo Legion Y7000.
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.