NM-A681 – Lenovo IdeaPad 100-15IBD
The Lenovo IdeaPad 100-15IBD, Lenovo IdeaPad CG410, Lenovo IdeaPad CG410CG510 and Lenovo IdeaPad CG510 are built on the NM-A681 board designed by LCFC. ChambersDesignInc.com has indexed 20 files for this board — 12 BIOS files, 3 schematics, 3 boardviews and 3 EC firmware images.
Revisions seen in file names: 1.0 and 0.2. The BIOS dumps are 8 MB images. ODM project names: CG410 and CG510. The earliest file dates from March 2017 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 12
Schematics 3
Boardviews 3
EC / KBC firmware 2
From the uploader
Lenovo IdeaPad 100-15IBD
CG410/CG510 NM-A681 Rev:1.0
GPU: nVidia N16V-GM-B1
Intel Core i3-5020U (SR240)
Multi: Lenovo IT8586E
UC3 - UE1
LENOVO TianYi 100-141BD CG410 CG510 NM-A681 REV 1.0 2015-06-26 i5-5200U
Board facts
| Board number | NM-A681 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | CG410, CG510 |
| Revisions | 1.0, 0.2 |
| BIOS chip size | 8 MB |
| Flash chip | W25Q64 |
| EC / KBC chip | IT8586E |
| CPU generation | Intel 5th gen |
| First seen | 2017-03-25 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Files |
| 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-A681
- Lenovo IdeaPad 100-15IBD
- Lenovo IdeaPad CG410
- Lenovo IdeaPad CG410CG510
- Lenovo IdeaPad CG510
- Lenovo 100 14IBD
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 |
| .bin | raw SPI flash image | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
| 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 |
Questions
Who designed the NM-A681 board?
NM-A681 is an LCFC board number used by Lenovo.
Which laptops use the NM-A681 board?
Files in the catalog link NM-A681 to the Lenovo IdeaPad 100-15IBD, Lenovo IdeaPad CG410, Lenovo IdeaPad CG410CG510, Lenovo IdeaPad CG510 and Lenovo 100 14IBD.
Is there a boardview for NM-A681?
Yes, 3 boardview files in .bdv format.
What BIOS chip size does NM-A681 use?
The BIOS images for NM-A681 are 8 MB. Flash chips named in the files: W25Q64.
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.