NM-B421 is a LCFC (Lenovo) motherboard used in Lenovo devices. Enginerys has 14 schematics, 8 boardviews, 50 BIOS dumps and 3 archives for this board, collected from public Telegram channels.
Check that NM-B421 matches the number printed on your PCB, including the revision. Where to find it →
NM-B421 schematics
- Lenovo e480 e580 LCFC NM-B421 PDF
Schematic package for the Lenovo ThinkPad E480 and E580, built on the LCFC NM-B421 motherboard, supplied as a RAR archive of about 10.9 MB holding the PDF diagram.
Schematic · NM-B421 · 10.9 MB · 23 Feb 2026Schematic rar10.9 MB - NM-B421 REV;1.0 PDFSchematic · NM-B421 · 10.9 MB · 2 Jun 2025Schematic pdf10.9 MB
- Thinkpad E580 LCFC NM-B421 DIS E480 E580 r1.0Schematic · NM-B421 · 10.3 MB · 9 May 2025Schematic pdf10.3 MB
- LCFC NM-B421 PDFSchematic · NM-B421 · 10.9 MB · 6 May 2025Schematic pdf10.9 MB
- 电路图NM-B421 NM-B531 ex85 amd svt 180410Schematic · NM-B421 · 1.28 MB · 5 May 2025Schematic pdf1.28 MB
- NM-B421 E480 580 SVT 2017 1030BSchematic · NM-B421 · 3.00 MB · 5 May 2025Schematic pdf3.00 MB
- Thinkpad E580 LCFC NM B421 DIS E480 E580 r1.0 c typeSchematic · NM-B421 · 10.9 MB · 5 May 2025Schematic pdf10.9 MB
- Eletro X EE480 EE580 NM B421 (REV 1.0)Schematic · NM-B421 · 3.16 MB · 29 Apr 2025Schematic pdf3.16 MB
- EE480 EE580 NM B421 (REV 1 PDFSchematic · NM-B421 · 2.96 MB · 29 Apr 2025Schematic rar2.96 MB
- Readings NM B421 LenovoSchematic · NM-B421 · 30.9 KB · 28 Apr 2025Schematic pdf30.9 KB
- NM-B421 DIS E480 E580 r1.0Schematic · NM-B421 · 10.9 MB · 17 Apr 2024Schematic pdf10.9 MB
- Thinkpad E580 LCFC NM-B421 BoardView PDFSchematic · NM-B421 · 188 KB · 26 Nov 2021Schematic pdf188 KB
- LCFC NM-B421 PDF
Schematic in PDF form for the LCFC board NM-B421, compressed into a 10.9 MB RAR archive; the name gives no laptop model or revision.
Schematic · NM-B421 · 10.9 MB · 18 Nov 2021Schematic rar10.9 MB - Thinkpad E580 LCFC NM-B421 DIS E480 E580 r1.0Schematic · NM-B421 · 10.9 MB · 2 Jul 2020Schematic pdf10.9 MB
NM-B421 boardviews
- Lenovo e480 e580 LCFC NM-B421 bdv
Boardview for the LCFC NM-B421 motherboard found in the Lenovo ThinkPad E480 and E580, packed in a 1.51 MB RAR archive.
Boardview · NM-B421 · 1.51 MB · 23 Feb 2026Boardview rar1.51 MB - NM-B421 REV;1.0Boardview · NM-B421 · 3.68 MB · 29 May 2025Boardview zip3.68 MB
- Eletro-X EE480 EE580 NM-B421 (REV 1.0) (BDV)Boardview · NM-B421 · 9.14 MB · 12 May 2025Boardview tvw9.14 MB
- EE480 EE580 NM B421 (REV 1.0) (BDV)Boardview · NM-B421 · 1.43 MB · 29 Apr 2025Boardview rar1.43 MB
- LENOVO E480 - NM-B421 Rev1.0 BoardView (BDV)(.TVW)Boardview · NM-B421 · 1.46 MB · 15 Dec 2024Boardview rar1.46 MB
- LENOVO E480 - NM-B421 Rev1.0 BoardView (BDV)(.TVW)
Boardview set for the Lenovo E480 (ThinkPad E480) on LCFC board NM-B421, revision 1.0. The 3.68 MB ZIP contains the layout in BDV format and also in TVW format, which is…
Boardview · NM-B421 · 3.68 MB · 24 Mar 2024Boardview zip3.68 MB - LENOVO E480 - NM-B421 Rev1.0 BoardView (BDV)(.TVW)
Boardview for the Lenovo ThinkPad E480 motherboard, LCFC NM-B421 revision 1.0, supplied in TVW format inside a RAR archive.
Boardview · NM-B421 · 1.51 MB · 24 Mar 2024Boardview rar1.51 MB - Thinkpad E580 LCFC NM-B421 BoardView PDF
Boardview for the Lenovo ThinkPad E580, board number NM-B421, designed by LCFC, Lenovo's own laptop ODM that uses the NM-xxxx numbering.
Boardview · NM-B421 · 228 KB · 6 Feb 2022Boardview rar228 KB
NM-B421 BIOS dumps
- E480 NM-B421 REV1.0 Ok Tested Bios BinBIOS · NM-B421 · 8.00 MB · 23 Oct 2026BIOS8.00 MB
- E480-EE580 NM-B421 REV 1.0 2017-10-30 BIOS & EC OK
Lenovo BIOS and EC firmware for the E480 and E580 motherboard, LCFC board number NM-B421 revision 1.0, dated 2017-10-30 and reported as working.
BIOS · NM-B421 · 4.81 MB · 15 Sept 2026BIOS rar4.81 MB - THINKPAD E480 EE480EE580 NM-B421 BIOS 1.0 PATCHEDBIOS · NM-B421 · 8.00 MB · 16 Jul 2026BIOS bin8.00 MB
- LENOVO E480 EE480.EE580 NM-B421 REV;1.0 BIOS OKBIOS · NM-B421 · 5.05 MB · 25 Jun 2026BIOS rar5.05 MB
- RTSx5455 NM-B421
Realtek RTS5455-family USB Type-C PD controller dump for Lenovo board NM-B421, provided as a 46.1 KB RAR archive.
BIOS · NM-B421 · 46.1 KB · 21 May 2026BIOS rar46.1 KB - Lenovo ThinkPad R480 NM B421 1 0 EE480 EE580 original 16 MB BIOSBIOS · NM-B421 · 4.97 MB · 24 Sept 2025BIOS zip4.97 MB
- LENOVO E480 EE480 EE580 NM B421 REV 1 0 2017 10 30 WORKING BIOSBIOS · NM-B421 · 5.06 MB · 24 Sept 2025BIOS zip5.06 MB
- Lenovo Thinkpad E480 E580 LCFC NM B421 Rev1 0vvv telegram BIOS RepairBIOS · NM-B421 · 4.98 MB · 24 Sept 2025BIOS zip4.98 MB
- Lenovo Thinkpad E480 E580 LCFC NM B421 Rev1 0 2017 10 30 telegramBIOS · NM-B421 · 5.05 MB · 24 Sept 2025BIOS zip5.05 MB
- LENOVO E480 EE480 EE580 NM B421 REV 1 0 2017 10 30 i5 8250U telegramBIOS · NM-B421 · 5.09 MB · 23 Sept 2025BIOS zip5.09 MB
- LENOVO E480 EE480 EE580 NM B421 REV 1 0 2017 10 30 i3 7020U telegramBIOS · NM-B421 · 5.12 MB · 23 Sept 2025BIOS zip5.12 MB
- Lenovo E480 E580, NM B421 clear me telegram BIOS Repair 2025 09BIOS · NM-B421 · 4.98 MB · 23 Sept 2025BIOS zip4.98 MB
- E480 EE580 NM B421 REV 1 0 2017 10 30 BIOS & EC telegram BIOS RepairBIOS · NM-B421 · 5.04 MB · 20 Sept 2025BIOS zip5.04 MB
- SM BIOS RTSx5455 NM-B421
Realtek RTS5455 series Type-C power delivery firmware for the Lenovo NM-B421 motherboard, an LCFC (Lenovo-owned ODM) board number.
BIOS · NM-B421 · 46.3 KB · 18 Sept 2025BIOS rar46.3 KB - NM-B421-REV-1.0.BIN ClrMeBIOS · NM-B421 · 4.67 MB · 30 Aug 2025BIOS rar4.67 MB
- NM-B421 LATE DISPLE OKBIOS · NM-B421 · 8.00 MB · 30 Aug 2025BIOS bin8.00 MB
- NM-B421-REV-1.0BIOS · NM-B421 · 8.00 MB · 29 Aug 2025BIOS bin8.00 MB
- THINKPAD E480 EE480 EE580 NM B421 REV 1 0 2017 10 30 AMD 216 0905004
Firmware package for Lenovo ThinkPad E480 and E580 on board NM-B421, revision 1.0 dated 2017-10-30, using the EE480 and EE580 project codes, archived as ZIP.
BIOS · NM-B421 · 8.04 MB · 8 Jul 2025BIOS zip8.04 MB - EE480 EE580 NM-B421 REV 1.0 2017-10-30 BIOS 7 KBEC OKOK
BIOS for Lenovo EE480 and EE580 projects, the ThinkPad E480 and E580, on LCFC board NM-B421 revision 1.0 dated 2017-10-30, packed in ZIP.
BIOS · NM-B421 · 7.30 MB · 8 Jul 2025BIOS zip7.30 MB - E480 EE580 NM-B421 REV 1.0 2017-10-30 BIOS & EC
BIOS and EC firmware set for Lenovo ThinkPad E480 and E580 on board NM-B421, revision 1.0, dated 2017-10-30 in the name. The RAR is about 5.16 MB.
BIOS · NM-B421 · 5.16 MB · 7 Jul 2025BIOS rar5.16 MB - EE480 EE580 NM-B421 Rev 1.0 2017-10-30BIOS · NM-B421 · 8.00 MB · 12 May 2025BIOS bin8.00 MB
- EE480 EE580 NM-B421 Rev 1.0 2017-10-30BIOS · NM-B421 · 8.00 MB · 9 May 2025BIOS bin8.00 MB
- E480 NM-B421 REV1.0BIOS · NM-B421 · 8.00 MB · 9 May 2025BIOS rom8.00 MB
- E480 nm-b421 rev1.0BIOS · NM-B421 · 8.00 MB · 9 May 2025BIOS bin8.00 MB
- EE480EE580 NM-B421 BIOS 1.0BIOS · NM-B421 · 8.00 MB · 9 May 2025BIOS bin8.00 MB
- LENOVO THIKPAD E580 E590 NM-B421 REV 1 TESTED BY FST FIXBIOS · NM-B421 · 8.00 MB · 9 May 2025BIOS bin8.00 MB
- NM-B421 REV 1 TESTED BY FST FIXBIOS · NM-B421 · 8.00 MB · 6 May 2025BIOS bin8.00 MB
- Lenovo Thinkpad E480 E580 LCFC NM-B421 Rev1.0vvvBIOS · NM-B421 · 8.00 MB · 5 May 2025BIOS bin8.00 MB
- Thinkpad E480 EE480 EE580 NM-B421 Rev 1.0BIOS · NM-B421 · 8.00 MB · 5 May 2025BIOS bin8.00 MB
- Thinkpad E580 EE480 EE580 NM B421 REV 1.0 DUMP OK ME ClearedBIOS · NM-B421 · 8.00 MB · 5 May 2025BIOS bin8.00 MB
- nm b421 rev1BIOS · NM-B421 · 8.00 MB · 29 Apr 2025BIOS bin8.00 MB
- NM B421 Rev 1.0 bin BY AadibBIOS · NM-B421 · 4.65 MB · 29 Apr 2025BIOS rar4.65 MB
- E580 Type 20KS 20KT Laptop ThinkPad Type 20KS NM B421 REV 1 TESTED
Lenovo ThinkPad E580 BIOS dump for machine types 20KS and 20KT, taken from a 20KS unit built on the NM-B421 motherboard, revision 1, and marked as tested.
BIOS · NM-B421 · 4.76 MB · 23 Dec 2024BIOS rar4.76 MB - NM-B421 REV 1 TESTED BY FST FIX
BIOS dump for an LCFC board NM-B421 revision 1, reported as tested by FST Fix, with no laptop model given in the name.
BIOS · NM-B421 · 4.70 MB · 23 Dec 2024BIOS rar4.70 MB - LENOVO THIKPAD E580 E590 NM-B421 REV 1 TESTED BY FST FIX
Tested BIOS dump for the Lenovo ThinkPad E580 and E590 on LCFC board NM-B421 revision 1.
BIOS · NM-B421 · 4.70 MB · 23 Dec 2024BIOS rar4.70 MB - AFS Lenovo Thinkpad E480 E580 LCFC NM-B421 Rev1.0vvv
BIOS dump shared by the Lenovo ThinkPad E480 and E580, both built on LCFC motherboard NM-B421 revision 1.0, stored in a 4.66 MB RAR archive.
BIOS · NM-B421 · 4.66 MB · 1 Feb 2024BIOS rar4.66 MB - AFS Lenovo Thinkpad E480 E580 LCFC NM-B421 Rev1.0 2017-10-30
Firmware image for the Lenovo ThinkPad E480 and E580 on LCFC motherboard NM-B421 revision 1.0, with the date 2017-10-30 in the name, supplied as a 4.72 MB RAR.
BIOS · NM-B421 · 4.72 MB · 1 Feb 2024BIOS rar4.72 MB - AFS Lenovo E480 E580, NM-B421 clear meBIOS · NM-B421 · 4.65 MB · 1 Feb 2024BIOS rar4.65 MB
- AFS Lenovo ThinkPad R480 NM B421 1 0 EE480 EE580 original 16 MBBIOS · NM-B421 · 4.66 MB · 1 Feb 2024BIOS rar4.66 MB
- LENOVO E480 EE480 EE580 NM-B421 REV 1.0 2017-10-30 i3-7020U
Lenovo ThinkPad E480 and E580 BIOS dump, with EE480 and EE580 also listed, for the LCFC board NM-B421 revision 1.0.
BIOS · NM-B421 · 8.66 MB · 17 Nov 2022BIOS rar8.66 MB - LENOVO E480 EE480 EE580 NM-B421 REV 1.0 2017-10-30 i5-8250U
Firmware archive for the Lenovo E480 / E580 family (EE480, EE580) built on the LCFC NM-B421 motherboard, revision 1.0, with the date code 2017-10-30.
BIOS · NM-B421 · 7.10 MB · 17 Nov 2022BIOS rar7.10 MB - LENOVO E480 EE480 EE580 NM B421 REV 1 0 2017 10 30 WORKING BIOS
Tested BIOS for Lenovo ThinkPad E480 and E580 laptops, also listed as EE480 and EE580, built on LCFC motherboard NM-B421 revision 1.0 dated 2017-10-30.
BIOS · NM-B421 · 7.23 MB · 17 Nov 2022BIOS rar7.23 MB - Lenovo Thinkpad E480 E580 LCFC NM-B421 Rev1.0 2017-10-30
BIOS package for the Lenovo ThinkPad E480 and E580 on LCFC board NM-B421, revision 1.0, dated 2017-10-30.
BIOS · NM-B421 · 4.77 MB · 23 Jan 2022BIOS rar4.77 MB - Lenovo ThinkPad R480 NM B421 1 0 EE480 EE580 original 16 MB BIOS
Original 16 MB BIOS for the Lenovo ThinkPad R480 on board NM-B421 revision 1.0, with EE480 and EE580 named as platform codes.
BIOS · NM-B421 · 4.89 MB · 25 Nov 2021BIOS zip4.89 MB - Thinkpad E580 EE480 EE580 NM-B421 REV-1.0 DUMP OK ME ClearedBIOS · NM-B421 · 8.00 MB · 24 Nov 2021BIOS bin8.00 MB
- Lenovo Thikpad E480 EE480 EE580 NM B421 REV 1 0 2017 10 30 TESTEDBIOS · NM-B421 · 4.76 MB · 9 Sept 2021BIOS rar4.76 MB
- Lenovo E480 E580, NM-B421 clear me
BIOS dump for the Lenovo ThinkPad E480 and E580 built on the NM-B421 motherboard, packed as a RAR archive of 4.71 MB.
BIOS · NM-B421 · 4.71 MB · 31 Mar 2021BIOS rar4.71 MB - Lenovo Thinkpad E480 E580 LCFC NM B421 Rev1 0vvv Luirons BiosBIOS · NM-B421 · 4.66 MB · 22 Feb 2021BIOS rar4.66 MB
- Thinkpad E480 EE480 EE580 NM-B421 Rev 1.0
BIOS dump for the Lenovo ThinkPad E480 and E580 range, also listed as EE480 and EE580, on the NM-B421 board revision 1.0.
BIOS · NM-B421 · 4.66 MB · 5 Jan 2021BIOS rar4.66 MB - Lenovo Thinkpad E480 E580 LCFC NM-B421 Rev1.0vvv
Firmware dump for Lenovo ThinkPad E480 and E580 laptops built on LCFC board NM-B421 revision 1.0, packed in a 4.66 MB RAR archive.
BIOS · NM-B421 · 4.66 MB · 31 Aug 2020BIOS rar4.66 MB
NM-B421 archives
- Thinkpad E480 NM-B421
ZIP archive for the Lenovo ThinkPad E480 with motherboard NM-B421, a board number in the NM pattern used by LCFC, Lenovo's own manufacturing arm.
Archive · NM-B421 · 1.73 MB · 28 Sept 2026Archive zip1.73 MB - EE480 EE580 NM B421 (REV 1.0) (2017 10 30)Archive · NM-B421 · 4.71 MB · 29 Apr 2025Archive rar4.71 MB
- Lenovo Thikpad E480 EE480 EE580 NM B421 REV 1 0 2017 10 30 TESTEArchive · NM-B421 · 4.76 MB · 28 Apr 2025Archive rar4.76 MB
Questions about NM-B421
Is there a schematic for NM-B421?
Yes. Enginerys lists 14 schematic files for NM-B421. Each entry links to the Telegram post where the PDF can be downloaded.
Is there a boardview for NM-B421?
Yes, 8 boardview files are listed. Open them with OpenBoardView or the viewer named on the file page.
Who makes the NM-B421 board?
NM-B421 follows the LCFC (Lenovo) numbering scheme (NM-xxxx). It is found in Lenovo devices.