Lenovo · laptop motherboard

Lenovo IdeaPad 720S-13IKB NM-B331

SchematicBIOS
Board code
NM-B331
Platform
DS321
Made by
LCFC
Revisions
Rev 1.0
Files
3
Updated

Lenovo IdeaPad 720S-13IKB NM-B331 is a laptop motherboard designed by LCFC and used in the Lenovo IdeaPad 720S-13IKB and Lenovo IdeaPad 720S 13IKB.

The catalog has 1 schematic and 2 BIOS files for it, posted between 2019 and 2021 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 is a PDF; 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.

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 DS321.

Compatible models

Files for Lenovo IdeaPad 720S-13IKB NM-B331

Schematics 1 All schematics →

BIOS and firmware 2 All bios and firmware →

Frequently asked questions

Which laptops use the NM-B331 motherboard?
File names in the catalog tie NM-B331 to the Lenovo IdeaPad 720S-13IKB and Lenovo IdeaPad 720S 13IKB. Laptops sold under one model name can use different boards, so confirm by the code printed on the motherboard.
Which revision of NM-B331 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-B331 BIOS?
Read the original chip with a programmer and save two copies before writing anything. 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