NM-A121 – Lenovo IdeaPad 11S
The NM-A121 (LCFC) motherboard is found in the Lenovo IdeaPad 11S and Lenovo Yoga 11S. 4 files are indexed for this board: 2 BIOS files, 1 schematic and 1 boardview.
Revisions seen in file names: 0.2 and 1.0. ODM project name: VIUU4. First posted in March 2022 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 2
Schematics 1
Boardviews 1
Board facts
| Board number | NM-A121 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | VIUU4 |
| Revisions | 0.2, 1.0 |
| First seen | 2022-03-17 |
| 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-A121
- Lenovo IdeaPad 11S
- Lenovo Yoga 11S
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 |
|---|---|---|
| .bdv | Honhan .bdv boardview | OpenBoardView, FlexBV or Honhan BoardViewer |
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .rar | RAR archive | 7-Zip or WinRAR |
| .tvw | Tebo-ICT .tvw boardview | FlexBV or Tebo-ICT View |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Which laptops use the NM-A121 board?
Files in the catalog link NM-A121 to the Lenovo IdeaPad 11S and Lenovo Yoga 11S.
Who designed the NM-A121 board?
NM-A121 is an LCFC board number used by Lenovo.
Is there a boardview for NM-A121?
Yes, 1 boardview file in .bdv and .tvw format.
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.