NM-A231 – Lenovo ThinkPad E455
NM-A231 is the LCFC main board used in the Lenovo ThinkPad E455 and Lenovo ThinkPad Edge E445. ChambersDesignInc.com has indexed 4 files for this board — 3 BIOS files and 1 schematic.
Revisions seen in file names: 1.0. ODM project name: AAVF1. The earliest file dates from July 2021 (BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics).
BIOS dumps 3
Schematics 1
Board facts
| Board number | NM-A231 |
|---|---|
| Designed by | LCFC |
| Platform group | NM-A |
| ODM project | AAVF1 |
| Revisions | 1.0 |
| First seen | 2021-07-14 |
| 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-A231
- Lenovo ThinkPad E455
- Lenovo ThinkPad Edge E445
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.
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 |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Is there a boardview for NM-A231?
No boardview has been indexed for NM-A231 yet; the schematic is available on this page.
Who designed the NM-A231 board?
NM-A231 is an LCFC board number used by Lenovo.
Which laptops use the NM-A231 board?
Files in the catalog link NM-A231 to the Lenovo ThinkPad E455 and Lenovo ThinkPad Edge E445.
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.