W540 - LKN-1 WS MB 12291-2
THINKPAD W540
LDM－1 WS
48.4LO13.OSC
SPI1PIN8=0.386 SPI2PIN8=0.386
L31 = 0.330 L32 = 0.187
L8 = 0.023 L6 = 0.023
L32 = 0.187 L34=0.073
L76=0.502 L39=0.496
L38=0.496 L37=0.496
L3=0.502 L4=0.455
L5=0.733 L30=0.285
Lenovo Thinkpad T540P - LKM-1 WS - 12291-2 Boardview
Lenovo Thinkpad W540 Wistron Kome-1 WS 12291-1 Rev -1 Schematic
THINKPAD W540
LDM－1 WS
48.4LO13.OSC
SPI1PIN8=0.386 SPI2PIN8=0.386
L31 = 0.330 L32 = 0.187
L8 = 0.023 L6 = 0.023
L32 = 0.187 L34=0.073
L76=0.502 L39=0.496
L38=0.496 L37=0.496
L3=0.502 L4=0.455
L5=0.733 L30=0.285
Lenovo Thinkpad T540P - LKM-1 WS - 12291-2 Boardview
Lenovo Thinkpad W540 Wistron Kome-1 WS 12291-1 Rev -1 Schematic
About this board
Thinkpad W540 LKN-1 WS — motherboard 12291-2.
Lenovo had this board built by Wistron; Wistron board numbers are 5–6 digits plus a revision. 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 12291-2 in File Finder.
Attachments
MEC1633 W540 12291-2.bin.zip
107.6 KB · Views: 25
107.6 KB · Views: 25
8MB BIOS.BIN.zip
3.3 MB · Views: 24
3.3 MB · Views: 24
4MB BIOS.BIN.zip
2.9 MB · Views: 26
2.9 MB · Views: 26
Lenovo Thinkpad T540P - LKM-1 WS - 12291-2 Boardview.zip
214.1 KB · Views: 38
214.1 KB · Views: 38
Lenovo Thinkpad W540 Wistron Kome-1 WS 12291-1 Rev -1 Schematic.pdf
3.7 MB · Views: 45
3.7 MB · Views: 45
