NM-A641
The NM-A641 board comes from LCFC. 5 files are indexed for this board: 2 BIOS files and 3 schematics.
File names mention revision 1.0. BIOS images are 8 MB. ODM project name: CMX40. First posted in February 2021 in Schematics & Boardviews Archive, Cyberlan Electronics and BIOS Archive.
BIOS dumps 2
Schematics 3
Board facts
| Board number | NM-A641 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | CMX40 |
| Revisions | 1.0 |
| BIOS chip size | 8 MB |
| First seen | 2021-02-10 |
| Source channels | Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Archive |
| About the number | LCFC is Lenovo's joint venture with Compal; its main boards use NM- numbers and sub-boards NS- numbers. |
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 |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Who designed the NM-A641 board?
NM-A641 is an LCFC board number used by Lenovo.
What BIOS chip size does NM-A641 use?
The BIOS images for NM-A641 are 8 MB.
Is there a boardview for NM-A641?
No boardview has been indexed for NM-A641 yet; the schematic is available on this page.
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.