Lenovo · laptop motherboard

Lenovo ThinkPad T490S NM-B891

SchematicBoardviewBIOSArchive
Board code
NM-B891
Platform
FX390
Made by
LCFC
Revisions
Rev 1.0, Rev 2.0
Files
16
Updated

Lenovo ThinkPad T490S NM-B891 is a laptop motherboard designed by LCFC and used in the Lenovo ThinkPad T490S and Lenovo X390.

The catalog has 2 schematics, 1 boardview file, 12 BIOS files and 1 archive for it, posted between 2020 and 2026 across 4 Telegram channels. Each download button opens the original Telegram post.

File names mention 2 board revisions (Rev 1.0 and Rev 2.0). 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 boardview comes in .BDV and .TVW format. .TVW files usually need FlexBV or the viewer they were exported for; OpenBoardView handles .BRD, .BDV and .FZ. See OpenBoardView: Installation and First Steps.

With both a schematic and a boardview you can find a net on the diagram and then locate the same part on the board by its reference designator. No Boardview for Your Board? How to Work Without One shows the workflow.

BIOS notes: file names mention 32 MB chip sizes. 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 FX390.

Compatible models

Files for Lenovo ThinkPad T490S NM-B891

Schematics 2 All schematics →

Boardview files 1 All boardview files →

BIOS and firmware 12 All bios and firmware →

Other files 1

Notes from the source posts

  • TYPE-C

Frequently asked questions

Which laptops use the NM-B891 motherboard?
File names in the catalog tie NM-B891 to the Lenovo ThinkPad T490S and Lenovo X390. Laptops sold under one model name can use different boards, so confirm by the code printed on the motherboard.
Which revision of NM-B891 do I have?
Files for this board mention Rev 1.0 and Rev 2.0. 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.
How do I open the NM-B891 boardview file?
The boardview for NM-B891 is available as .BDV and .TVW. .BDV usually opens in OpenBoardView (free) or FlexBV. .TVW usually needs FlexBV or the matching viewer. See What Is a Boardview File and Why You Need One.
What should I check before flashing the NM-B891 BIOS?
Read the original chip with a programmer and save two copies before writing anything. File names for this board mention 32 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