NM-E481 – Lenovo JY577
The NM-E481 (LCFC) motherboard is found in the Lenovo JY577 and Lenovo Legion R7000P. 4 files are indexed for this board: 2 BIOS files, 1 schematic and 1 boardview.
File names mention revision 1.0. The BIOS dumps are 32 MB images. ODM project names: JY578, JY679 and JY670. The earliest file dates from November 2023 (Cyberlan Electronics, Schematics & Boardviews Archive and BIOS Archive).
BIOS dumps 2
Schematics 1
Boardviews 1
Board facts
| Board number | NM-E481 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-E |
| ODM project | JY578, JY679, JY670 |
| Revisions | 1.0 |
| BIOS chip size | 32 MB |
| First seen | 2023-11-14 |
| Source channels | Cyberlan Electronics, Schematics & Boardviews Archive, BIOS 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-E481
- Lenovo JY577
- Lenovo Legion R7000P
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 |
|---|---|---|
| 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 |
| .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
Which laptops use the NM-E481 board?
Files in the catalog link NM-E481 to the Lenovo JY577 and Lenovo Legion R7000P.
Who designed the NM-E481 board?
NM-E481 is an LCFC board number used by Lenovo.
What BIOS chip size does NM-E481 use?
The BIOS images for NM-E481 are 32 MB.
Are these files free?
1 of the posts are marked VIP or paid in their source channel; the others are ordinary posts. ChambersDesignInc.com does not host or sell files.
Is there a boardview for NM-E481?
Yes, 1 boardview file in .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.