Lenovo · laptop motherboard

Lenovo ThinkPad T460S NM-A421

SchematicBIOS
Board code
NM-A421
Platform
BT460
Made by
LCFC
Revisions
Rev 1.0, Rev 3.0, Rev 4.0
Files
11
Updated

Lenovo ThinkPad T460S NM-A421 is a laptop motherboard designed by LCFC and used in the Lenovo ThinkPad T460S.

The catalog has 3 schematics and 8 BIOS files for it, posted between 2020 and 2024 across 3 Telegram channels. Each download button opens the original Telegram post.

File names mention 3 board revisions (Rev 1.0, Rev 3.0 and Rev 4.0). Check the revision printed on your PCB before relying on a boardview or flashing a BIOS dump — How to Open .FZ Boardview Files explains why it matters.

The schematic files are PDFs; the first pages usually hold the block diagram and the power sequence. New to schematics? Start with How to Use a Schematic and a Boardview Together.

BIOS notes: file names mention 16 MB chip sizes; versions with a cleaned ME region are included. Read and save the original chip contents before you write anything to it — Keeping the Windows Product Key (MSDM) When Reflashing a BIOS.

Also listed under platform BT460.

Compatible models

Files for Lenovo ThinkPad T460S NM-A421

Schematics 3 All schematics →

BIOS and firmware 8 All bios and firmware →

Notes from the source posts

  • Remove all battery and CMOS battery
  • press F1 to enter setup: password 1234
  • wait 20sec or more.
  • Enter any ID to hardware Id.
  • Press 2x space bar when asked.
  • Turn off the computer.

Frequently asked questions

Which laptops use the NM-A421 motherboard?
File names in the catalog tie NM-A421 to the Lenovo ThinkPad T460S. Laptops sold under one model name can use different boards, so confirm by the code printed on the motherboard.
Which revision of NM-A421 do I have?
Files for this board mention Rev 1.0, Rev 3.0 and Rev 4.0. The revision is printed on the PCB silkscreen, usually next to the board code. Pick files with the same revision when you can; if yours is not listed, the closest revision is usually fine for the schematic but check part positions in the boardview carefully.
What should I check before flashing the NM-A421 BIOS?
Read the original chip with a programmer and save two copies before writing anything. File names for this board mention 16 MB images; the dump size must match your chip. A dump from another board carries that board's serial number and MAC address, so restore yours from the backup.

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Files are hosted on Telegram by third parties; ExcitingSpas.com only links to public posts. Check that a file matches your board before using it. Disclaimer · Report a file