5.3.1 Before You Begin

Complete these tasks:

• "2.1 How to Power Off the System"

• "6.1 How to Remove a Power Supply"

• "2.4 How to Position the System for Service"

• "2.6 How to Remove the System Cover"

• "2.8 How to Avoid Electrostatic Discharge"

• "6.3 How to Remove the Fan Tray Assembly"

Unplug the AC power cord(s) from the back of the system before performing this procedure. Attempting to remove the power distribution board while the AC power cord is plugged into a power source can result in serious personal injury.

You need to remove the system power supplies before attempting to remove the power distribution board.