T490s FT491-FX390 NM-B891
BIOS
T490S/X390 Logic Schematics
FILE BACKUP
Jazz/Sideswipe VER 1.0
boardview Thinkpad T490s - NM-B891Boardview
NM-B891-TYPE-C
BIOS
T490S/X390 Logic Schematics
FILE BACKUP
Jazz/Sideswipe VER 1.0
boardview Thinkpad T490s - NM-B891Boardview
NM-B891-TYPE-C
About this board
Files for the Thinkpad T490s FT491-FX390 motherboard, board number NM-B891.
Lenovo had this board built by LCFC; LCFC (Lenovo/Compal) board numbers start with NM-. Check the number printed on the PCB before you download.
What this thread covers
- BIOS (full SPI chip dump, .bin)
Common cases: dead board after an interrupted BIOS update, ME region errors, missing serial number or UUID after a board swap, or a password lock.
Back up the original dump first — it contains machine-specific data (serial, UUID, MAC, ME), and you will want it if anything goes wrong.
If you have a working file for this board, please share it below. More files: search NM-B891 in File Finder.
Attachments
Thinkpad T490s - NM-B891Brdvew.tvw.zip
1.6 MB · Views: 84
1.6 MB · Views: 84
NM-B891 Schematics.pdf
3.9 MB · Views: 77
3.9 MB · Views: 77
T490_mec.bin.zip
131.6 KB · Views: 42
131.6 KB · Views: 42
NM-B891-TYPE-C.BIN.zip
221.4 KB · Views: 37
221.4 KB · Views: 37
back-MX25L25633F.rar
10.4 MB · Views: 82
10.4 MB · Views: 82
