Lenovo · laptop motherboard

Lenovo ThinkPad X1 Carbon NM-B481

SchematicBIOS
Board code
NM-B481
Platform
EX480
Made by
LCFC
Revisions
Rev 1.0
Files
10
Updated

Lenovo ThinkPad X1 Carbon NM-B481 is a laptop motherboard designed by LCFC and used in the Lenovo ThinkPad X1 Carbon, Lenovo X480 and Lenovo ThinkPad Carbon X1.

The catalog has 2 schematics and 8 BIOS files for it, posted between 2021 and 2025 across 3 Telegram channels. Each download button opens the original Telegram post.

The files are marked Rev 1.0; other revisions of the same board can differ in parts and layout.

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 1 MB, 8 MB and 16 MB chip sizes; some archives also hold EC/KBC firmware. 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 EX480.

Compatible models

Files for Lenovo ThinkPad X1 Carbon NM-B481

Schematics 2 All schematics →

BIOS and firmware 8 All bios and firmware →

Notes from the source posts

  • You can give us as a gift.

Frequently asked questions

Which laptops use the NM-B481 motherboard?
File names in the catalog tie NM-B481 to the Lenovo ThinkPad X1 Carbon, Lenovo X480 and Lenovo ThinkPad Carbon X1. Laptops sold under one model name can use different boards, so confirm by the code printed on the motherboard.
Which revision of NM-B481 do I have?
Files for this board mention Rev 1.0. 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-B481 BIOS?
Read the original chip with a programmer and save two copies before writing anything. File names for this board mention 1 MB, 8 MB and 16 MB images; the dump size must match your chip. Some archives include EC/KBC firmware, which may need to be written to a separate 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