NM-A411 – Lenovo ThinkPad 900-13ISK
The NM-A411 (LCFC) motherboard is found in the Lenovo ThinkPad 900-13ISK and Lenovo Yoga 900-13ISK. The catalog lists 5 files for it: 3 BIOS files, 2 schematics and 1 EC firmware image.
File names mention revision 1.0. ODM project name: BYG40. The earliest file dates from May 2021 (BIOS Archive, Cyberlan Electronics and Schematics & Boardviews Archive).
BIOS dumps 3
Schematics 2
Board facts
| Board number | NM-A411 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | BYG40 |
| Revisions | 1.0 |
| First seen | 2021-05-18 |
| Source channels | BIOS Archive, Cyberlan Electronics, Schematics & Boardviews Archive |
| 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-A411
- Lenovo ThinkPad 900-13ISK
- Lenovo Yoga 900-13ISK
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 |
|---|---|---|
| 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-A411 board?
NM-A411 is an LCFC board number used by Lenovo.
Which laptops use the NM-A411 board?
Files in the catalog link NM-A411 to the Lenovo ThinkPad 900-13ISK and Lenovo Yoga 900-13ISK.
Is there a boardview for NM-A411?
No boardview has been indexed for NM-A411 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.