NM-A821 – Lenovo ThinkPad E470
The Lenovo ThinkPad E470, Lenovo E470C and Lenovo UC8 are built on the NM-A821 board designed by LCFC. ChambersDesignInc.com has indexed 12 files for this board — 9 BIOS files, 2 schematics, 1 boardview and 1 EC firmware image.
Revisions seen in file names: 3.0, 2.0, 1.0 and 4.0. The BIOS dumps are 8 MB images. ODM project name: CE470. The earliest file dates from July 2019 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 9
Schematics 2
Boardviews 1
Board facts
| Board number | NM-A821 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | CE470 |
| Revisions | 3.0, 2.0, 1.0, 4.0 |
| BIOS chip size | 8 MB |
| First seen | 2019-07-13 |
| 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-A821
- Lenovo ThinkPad E470
- Lenovo E470C
- Lenovo UC8
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 |
| .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 |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Who designed the NM-A821 board?
NM-A821 is an LCFC board number used by Lenovo.
Is there a boardview for NM-A821?
Yes, 1 boardview file in .bdv and .cad format.
What BIOS chip size does NM-A821 use?
The BIOS images for NM-A821 are 8 MB.
Which laptops use the NM-A821 board?
Files in the catalog link NM-A821 to the Lenovo ThinkPad E470, Lenovo E470C and Lenovo UC8.
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.