Fixed the NOVO button can't be powered on when AC adapter only.
Important Information
Lenovo strongly suggests rebooting the system before applying the BIOS update.
BIOS Version: PIWG4310.ROM (40CN11WW(V3.10))
Installation Instructions
How to flash BIOS: a. Please use flashit.exe V1.4c For flash BIOS only, "flashit PIWG4310.ROM /all /bios" For flash BIOS+EC, "flashit PIWG4310.bin /all /bios /ecb" b. For flash BIOS only, please use flash.bat For flash BIOS+EC, please use flasha.bat