Surface won't power down but stuck on a Black Screen:
Volume Rocker Up and Power Button - 10 Seconds
Wait 10 Seconds
Power Button - Surface wakes back up
Surface won't Power Up:
Volume Rocker Down + Power Button = Power Up
Advanced Boot-up from a powered down Surface:
Press and Hold Volume Rocker Up + Power Button + release both = Advanced UEFI Screen (Touch Screen should work, but you can also navigate via the Volume Rocker and Windows Key)
CTRL - ALT - Delete:
Windows Key + Power Button
Print Screen:
Volume Rocker Down + Windows Button