NM-A271 – Lenovo G50-70
The Lenovo G50-70 and Lenovo G40 70 are built on the NM-A271 board designed by LCFC. The catalog lists 21 files for it: 16 BIOS files, 4 schematics and 4 EC firmware images.
File names mention revision 1.0. The BIOS dumps are 8 MB images. ODM project names: ACLU1 and ACLU2. The earliest file dates from May 2017 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 16
Schematics 4
EC / KBC firmware 1
From the uploader
LENOVO G50-70 ACLU1 ACLU2 NM-A271 REV 1.0 2013-12-05 WORKING BIOS &KBEC 100%
LENOVO G40-70 ACLU1 ACLU2 NM-A271 REV 1.0 2013-12-05 WORKING BIOS &KBEC 100%
Board facts
| Board number | NM-A271 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | ACLU1, ACLU2 |
| Revisions | 1.0 |
| BIOS chip size | 8 MB |
| Flash chip | GD25Q64 |
| EC / KBC chip | IT8586E |
| GPU | 216-0856050 |
| Graphics | discrete GPU |
| First seen | 2017-05-03 |
| 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-A271
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.
EC (embedded controller) firmware runs the keyboard controller, power sequencing, battery charging and fans. Depending on the board it lives in a separate chip (ENE KB9012, ITE IT85xx, Nuvoton NPCE) or inside the main SPI image, so check which applies before flashing.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .7z | 7-Zip archive | 7-Zip or WinRAR |
| .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
Which laptops use the NM-A271 board?
Files in the catalog link NM-A271 to the Lenovo G50-70 and Lenovo G40 70.
What BIOS chip size does NM-A271 use?
The BIOS images for NM-A271 are 8 MB. Flash chips named in the files: GD25Q64.
Is there a boardview for NM-A271?
No boardview has been indexed for NM-A271 yet; the schematic is available on this page.
Who designed the NM-A271 board?
NM-A271 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.