NM-D031
NM-D031 is an LCFC Lenovo main board number. The catalog lists 13 files for it: 8 BIOS files, 2 schematics and 3 boardviews.
Revisions seen in file names: 1.0. The BIOS dumps are 16 MB images. ODM project names: GV450 and GV550. First posted in March 2021 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 8
Schematics 2
Boardviews 3
From the uploader
LENOVO idepad 3 15IIL05 GS454 GS554 GV450 GV550 REV 1.0 NM-D031 2019-12-06 (10th GEN) CPU
LENOVO_idepad_3_15IIL05_GS454_GS554_GV450_GV550_REV_1_0_NM_D031 REV 1.0 2019-12-06 CLEAN ME REGION OK
GS454 GS554 GV450 GV550 NM-D031 REV 1.0 2019-12-26 UMA(NO GPU) 16MB FAST BOOT
Board facts
| Board number | NM-D031 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-D |
| ODM project | GV450, GV550 |
| Revisions | 1.0 |
| BIOS chip size | 16 MB |
| CPU generation | Intel 10th gen |
| First seen | 2021-03-16 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics, Boardview Schematics |
| About the number | LCFC is Lenovo's joint venture with Compal; its main boards use NM- numbers and sub-boards NS- numbers. |
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 |
|---|---|---|
| .7z | 7-Zip archive | 7-Zip or WinRAR |
| .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-D031 board?
NM-D031 is an LCFC board number used by Lenovo.
What BIOS chip size does NM-D031 use?
The BIOS images for NM-D031 are 16 MB.
Is there a boardview for NM-D031?
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.