NM-B461 – Lenovo ThinkPad L480
NM-B461 is the LCFC main board used in the Lenovo ThinkPad L480 and Lenovo ThinkPad L580. The catalog lists 7 files for it: 4 BIOS files, 2 schematics and 1 boardview.
Revisions seen in file names: 1.0 and 0.1. ODM project names: EL480 and EL580. First posted in April 2019 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 4
Schematics 2
Boardviews 1
Board facts
| Board number | NM-B461 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-B |
| ODM project | EL480, EL580 |
| Revisions | 1.0, 0.1 |
| First seen | 2019-04-13 |
| 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-B461
- Lenovo ThinkPad L480
- Lenovo ThinkPad L580
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 |
|---|---|---|
| .rar | RAR archive | 7-Zip or WinRAR |
| .tvw | Tebo-ICT .tvw boardview | FlexBV or Tebo-ICT View |
| .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-B461 board?
NM-B461 is an LCFC board number used by Lenovo.
Is there a boardview for NM-B461?
Yes, 1 boardview file in .tvw format.
Which laptops use the NM-B461 board?
Files in the catalog link NM-B461 to the Lenovo ThinkPad L480 and Lenovo ThinkPad L580.
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.