Plug the printer into a wall outlet and unplug it from USB.

Quickly toggle the power switch on and off to make sure no smoke comes out.

If all is goes well, turn on the CR-10. Make sure that the printer is reading the correct ambient temperature for the hotend and the bed.

Jog each axis to test them. Try homing them too.

Heat up the HotEnd and heated bed to make sure that they heat alright.

While the HotEnd is hot, try moving the extruder.