NM-D191
NM-D191 is an LCFC Lenovo main board number. ChambersDesignInc.com has indexed 7 files for this board — 5 BIOS files, 1 schematic and 1 boardview.
Revisions seen in file names: 1.0 and 0.2. ODM project names: GY535 and GY536. The earliest file dates from August 2022 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 5
Schematics 1
Boardviews 1
From the uploader
Lenovo Gaming 3 15ARH05 GY535 GY536 NM-D191 REV 1.0 2020-05-13 WORKING BIOS EUCN28WW
Board facts
| Board number | NM-D191 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-D |
| ODM project | GY535, GY536 |
| Revisions | 1.0, 0.2 |
| First seen | 2022-08-20 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics, BIOS Files |
| About the number | LCFC is Lenovo's joint venture with Compal; its main boards use NM- numbers and sub-boards NS- numbers. |
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
Who designed the NM-D191 board?
NM-D191 is an LCFC board number used by Lenovo.
Is there a boardview for NM-D191?
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.