NM-B661 – Lenovo IdeaPad 330-14IGM
NM-B661 is the LCFC main board used in the Lenovo IdeaPad 330-14IGM, Lenovo IdeaPad EG431-EG532 and Lenovo IdeaPad 330-15IGM. The catalog lists 17 files for it: 11 BIOS files, 3 schematics and 3 boardviews.
File names mention revision 1.0 or 0.1. BIOS images are 8 MB. ODM project names: EG431, EG532 and EG531. First posted in May 2019 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 11
Schematics 3
Boardviews 3
From the uploader
24- LENOVO 330 - 14IGM EG431 EG532 FG5N2 NM-B661 REV 1.0 2018-02-28 BIOS & EC
EG431 EG532 FG532 NM-B661 REV 1.0 2018-02-28
TESTED OKOK
Vip file
Board facts
| Board number | NM-B661 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-B |
| ODM project | EG431, EG532, EG531 |
| Revisions | 1.0, 0.1 |
| BIOS chip size | 8 MB |
| Flash chip | W25Q64FWSIQ |
| First seen | 2019-05-28 |
| 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-B661
- Lenovo IdeaPad 330-14IGM
- Lenovo IdeaPad EG431-EG532
- Lenovo IdeaPad 330-15IGM
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
Are these files free?
2 of the posts are marked VIP or paid in their source channel; the others are ordinary posts. ChambersDesignInc.com does not host or sell files.
Who designed the NM-B661 board?
NM-B661 is an LCFC board number used by Lenovo.
What BIOS chip size does NM-B661 use?
The BIOS images for NM-B661 are 8 MB. Flash chips named in the files: W25Q64FWSIQ.
Which laptops use the NM-B661 board?
Files in the catalog link NM-B661 to the Lenovo IdeaPad 330-14IGM, Lenovo IdeaPad EG431-EG532 and Lenovo IdeaPad 330-15IGM.
Is there a boardview for NM-B661?
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.