NM-A831 – Lenovo ThinkPad E570
NM-A831 is the LCFC main board used in the Lenovo ThinkPad E570. The catalog lists 14 files for it: 11 BIOS files, 2 schematics, 1 boardview and 2 EC firmware images.
File names mention revision 3.0, 2.0 or 1.0. The BIOS dumps are 8 MB images. ODM project names: CE570 and CE470. The earliest file dates from February 2019 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 11
Schematics 2
Boardviews 1
From the uploader
CE570 NM-A831 REV 3.0 2016-11-08 BIOS & KBEC TESTED OK
Board facts
| Board number | NM-A831 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | CE570, CE470 |
| Revisions | 3.0, 2.0, 1.0 |
| BIOS chip size | 8 MB |
| Flash chip | W25Q64 |
| First seen | 2019-02-19 |
| 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-A831
- Lenovo ThinkPad E570
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 |
|---|---|---|
| .cad | .cad boardview | FlexBV, OpenBoardView or 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
Which laptops use the NM-A831 board?
Files in the catalog link NM-A831 to the Lenovo ThinkPad E570.
Is there a boardview for NM-A831?
Yes, 1 boardview file in .cad format.
What BIOS chip size does NM-A831 use?
The BIOS images for NM-A831 are 8 MB. Flash chips named in the files: W25Q64.
Who designed the NM-A831 board?
NM-A831 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.