I am having the same issue and I am running windows 10 x64 Home edition
updated everything, used someone elses laptop to update firmware.
Still no charging, or screens come on. But keyboard and mouse USB works.
I also ran the automatic scan tool from lenovo for driver updates. Still not working.
Rebooted PC several times, nothing.
Checked windows updates - nothing
Updated firmware to Laptop - Nothing
PLEASE HELP.