NM-B191 – Lenovo Legion Y520-15IKBN
The Lenovo Legion Y520-15IKBN and Lenovo Y520-15LKBN are built on the NM-B191 board designed by LCFC. The catalog lists 15 files for it: 10 BIOS files, 3 schematics, 2 boardviews and 1 EC firmware image.
Revisions seen in file names: 1.0. The BIOS dumps are 1 MB, 8 MB and 16 MB images. ODM project name: DY512. First posted in March 2019 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 10
Schematics 3
Boardviews 2
From the uploader
LENOVO Y520 -15IKBN DY512 NM-B191 REV 1.0 2016-11-25 VGA GTX 1050 CPU I5-7300HQ
DY512 NM-B191 REV 1.0 2016-11-25 N17P-G1-A1 GTX 1050TI 8MB & 1MB CLEAN ME REGION OKOK
Board facts
| Board number | NM-B191 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-B |
| ODM project | DY512 |
| Revisions | 1.0 |
| BIOS chip size | 1 MB, 8 MB, 16 MB |
| GPU | GTX 1050, GTX 1050TI |
| CPU generation | Intel 7th gen |
| Graphics | discrete GPU |
| First seen | 2019-03-25 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics, Boardview Schematics |
| 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-B191
- Lenovo Legion Y520-15IKBN
- Lenovo Y520-15LKBN
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 |
| .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
Is there a boardview for NM-B191?
Yes, 2 boardview files.
Who designed the NM-B191 board?
NM-B191 is an LCFC board number used by Lenovo.
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.
What BIOS chip size does NM-B191 use?
The BIOS images for NM-B191 are 1 MB, 8 MB and 16 MB.
Which laptops use the NM-B191 board?
Files in the catalog link NM-B191 to the Lenovo Legion Y520-15IKBN and Lenovo Y520-15LKBN.
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.