Lenovo Yoga S940-14IIL LS40IC MB 18777-1
BIOS BQCN31WW, Schematics
Lenovo Yoga S940-14IIL LS40IC MB 18777-1
Lenovo Yoga S940-14IIL Wistron LS40 LS40IC 18777-1 BoardView.cad
BIOS BQCN31WW, Schematics
Lenovo Yoga S940-14IIL LS40IC MB 18777-1
Lenovo Yoga S940-14IIL Wistron LS40 LS40IC 18777-1 BoardView.cad
About this board
This thread is for the Lenovo Yoga S940-14IIL LS40IC with main board 18777-1.
The board was manufactured by Wistron for Lenovo. Wistron board numbers are 5–6 digits plus a revision, so you can confirm it on the PCB silkscreen.
Files usually needed for this board
- BIOS (full SPI chip dump, .bin)
- EC / KBC firmware, if the board uses a separate EC chip
- Schematic (PDF)
- Boardview (.brd / .bdv / .cad)
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.
Before flashing, always read and save the original chip. It holds the serial number, UUID, MAC address and ME data for that exact machine.
Have a tested file for 18777-1? Reply below and help the next technician. Looking for something else? Search all files in the File Finder.
Attachments
BQCN31WW.rar
6.3 MB · Views: 9
6.3 MB · Views: 9
Lenovo Yoga S940-14IIL Wistron LS40 LS40IC 18777-1 BoardView.cad.zip
79.9 KB · Views: 9
79.9 KB · Views: 9
18777 EE.pdf
2.2 MB · Views: 5
2.2 MB · Views: 5
