NM-A541 – Lenovo Y700
NM-A541 is the LCFC main board used in the Lenovo Y700 and Lenovo Y700-15ISK 17ISK. The catalog lists 6 files for it: 3 BIOS files, 2 schematics and 1 boardview.
File names mention revision 1.0 or 0.3. BIOS images are 4 MB and 8 MB. ODM project name: BY511. First posted in October 2019 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 3
Schematics 2
Boardviews 1
Board facts
| Board number | NM-A541 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | BY511 |
| Revisions | 1.0, 0.3 |
| BIOS chip size | 4 MB, 8 MB |
| First seen | 2019-10-22 |
| 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-A541
- Lenovo Y700
- Lenovo Y700-15ISK 17ISK
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 |
| .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-A541 board?
NM-A541 is an LCFC board number used by Lenovo.
Which laptops use the NM-A541 board?
Files in the catalog link NM-A541 to the Lenovo Y700 and Lenovo Y700-15ISK 17ISK.
What BIOS chip size does NM-A541 use?
The BIOS images for NM-A541 are 4 MB and 8 MB.
Is there a boardview for NM-A541?
Yes, 1 boardview file.
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.