Dell PowerEdge 1955 Guide De Mise En Route page 12

Connect the System and Monitor (Optional) to Power
Connect the system's power cable(s) to the system. Next, plug the other end of the cable into a
grounded electrical outlet or a separate power source such as an uninterruptible power supply (UPS) or
a power distribution unit (PDU). Connect the monitor's power cable to a grounded electrical outlet.
Turn on the System and Monitor (Optional)
Press the power button on the chassis and the monitor. The power indicators should light.
Adjust the monitor's controls until the displayed image is satisfactory.
10
Getting Started With Your System