IBM 3270 Hardware User's Manual page 42

9. Plug the power cord into the back of the
display.
1111111111"""",
11111111111 !I II 111/
1111111"""
1111/11111111
Do not plug the power cord into a wall outlet
until you are told to do so later.
Chapter 2. Setting Up and Checking Your 3270 PC 2-25