NM-A331 – Lenovo G70-50
The Lenovo G70-50, Lenovo 80, Lenovo G70 70 and Lenovo Z70 are built on the NM-A331 board designed by LCFC. ChambersDesignInc.com has indexed 5 files for this board — 3 BIOS files and 2 schematics.
File names mention revision 1.0 or 0.4. ODM project names: AILG1, BALG1 and AILZ1. First posted in February 2021 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 3
Schematics 2
Board facts
| Board number | NM-A331 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | AILG1, BALG1, AILZ1 |
| Revisions | 1.0, 0.4 |
| First seen | 2021-02-04 |
| 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-A331
- Lenovo G70-50
- Lenovo 80
- Lenovo G70 70
- Lenovo Z70
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.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| 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-A331 board?
NM-A331 is an LCFC board number used by Lenovo.
Is there a boardview for NM-A331?
No boardview has been indexed for NM-A331 yet; the schematic is available on this page.
Which laptops use the NM-A331 board?
Files in the catalog link NM-A331 to the Lenovo G70-50, Lenovo 80, Lenovo G70 70 and Lenovo Z70.
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.