NM-B242 – Lenovo IdeaPad DG421
The Lenovo IdeaPad DG421, Lenovo IdeaPad DG521, Lenovo IdeaPad 320 15IKB and Lenovo IdeaPad DG721 are built on the NM-B242 board designed by LCFC. ChambersDesignInc.com has indexed 13 files for this board — 8 BIOS files, 4 schematics, 1 boardview and 2 EC firmware images.
File names mention revision 1.0. ODM project names: DG521 and DG721. The earliest file dates from May 2019 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 8
Schematics 4
Boardviews 1
From the uploader
Lenovo IdeaPad 320-15IKB NM-B241 NM-B242 DG421 DG521 DG721
Model: Lenovo IdeaPad 320-15IKB
Platforma: LCFC DG421 DG521 DG721 NM-B241 NM-B242 DIS
Rev: 1.0
Board facts
| Board number | NM-B242 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-B |
| ODM project | DG521, DG721 |
| Revisions | 1.0 |
| CPU generation | Intel 6th gen, Intel 7th gen |
| Graphics | discrete GPU |
| 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-B242
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 |
| .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-B242 board?
NM-B242 is an LCFC board number used by Lenovo.
Which laptops use the NM-B242 board?
Files in the catalog link NM-B242 to the Lenovo IdeaPad DG421, Lenovo IdeaPad DG521, Lenovo IdeaPad 320 15IKB, Lenovo IdeaPad DG721, Lenovo 320-15ISK and Lenovo IdeaPad 320.
Is there a boardview for NM-B242?
Yes, 1 boardview file in .bdv 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.