NM-A273 – Lenovo Z50-70
NM-A273 is the LCFC main board used in the Lenovo Z50-70, Lenovo G50-70 and Lenovo G50 70 G40. 17 files are indexed for this board: 12 BIOS files, 2 schematics, 2 boardviews and 2 EC firmware images.
Revisions seen in file names: 1.0 and 0.3. BIOS images are 8 MB. The earliest file dates from January 2017 (BIOS Archive, Cyberlan Electronics and Schematics & Boardviews Archive).
BIOS dumps 12
Schematics 2
Boardviews 2
EC / KBC firmware 1
From the uploader
LENOVO G50-70 ACLUA ACLUB NM-A273 Rev 1.0 2013-12-27 i7-4510U N15S-GT-S-A2 UC3
LENOVO G50-70 ACLUA ACLUB NM-A273 Rev 1.0 2013-12-27 i5-4210U N15S-GT-S-A2 UC3
TESTED FOR VGA DRIVER OKOK
Board facts
| Board number | NM-A273 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| Revisions | 1.0, 0.3 |
| BIOS chip size | 8 MB |
| EC / KBC chip | IT8586E |
| CPU generation | Intel 4th gen |
| First seen | 2017-01-26 |
| Source channels | BIOS Archive, Cyberlan Electronics, Schematics & Boardviews Archive, 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-A273
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 |
|---|---|---|
| .7z | 7-Zip archive | 7-Zip or WinRAR |
| .bdv | Honhan .bdv boardview | OpenBoardView, FlexBV or Honhan BoardViewer |
| .bin | raw SPI flash image | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
| 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 |
Questions
Is there a boardview for NM-A273?
Yes, 2 boardview files in .bdv format.
Who designed the NM-A273 board?
NM-A273 is an LCFC board number used by Lenovo.
What BIOS chip size does NM-A273 use?
The BIOS images for NM-A273 are 8 MB.
Which laptops use the NM-A273 board?
Files in the catalog link NM-A273 to the Lenovo Z50-70, Lenovo G50-70 and Lenovo G50 70 G40.
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.