Lenovo · laptop motherboard

Lenovo B71-80 NM-A491

SchematicBoardviewBIOS
Board code
NM-A491
Platform
BMWD1
Made by
LCFC
Revisions
Rev 1.0
Files
5
Updated

Lenovo B71-80 NM-A491 is a laptop motherboard designed by LCFC and used in the Lenovo B71-80 and Lenovo IdeaPad 300-17ISK.

The catalog has 2 schematics, 1 boardview file and 2 BIOS files for it, posted between 2018 and 2023 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 boardview comes in .BDV and .CAD format. .CAD 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: 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 BMWD1.

Compatible models

  • Lenovo B71-80
  • Lenovo IdeaPad 300-17ISK

Files for Lenovo B71-80 NM-A491

Schematics 2 All schematics →

Boardview files 1 All boardview files →

BIOS and firmware 2 All bios and firmware →

Notes from the source posts

  • CPU: SR2EY (Intel Core i5-6200U)
  • ITE IT8586E FXA

Frequently asked questions

Which laptops use the NM-A491 motherboard?
File names in the catalog tie NM-A491 to the Lenovo B71-80 and Lenovo IdeaPad 300-17ISK. Laptops sold under one model name can use different boards, so confirm by the code printed on the motherboard.
Which revision of NM-A491 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.
How do I open the NM-A491 boardview file?
The boardview for NM-A491 is available as .BDV and .CAD. .BDV usually opens in OpenBoardView (free) or FlexBV. .CAD 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-A491 BIOS?
Read the original chip with a programmer and save two copies before writing anything. 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