50 Installing System Components
Power Supply
Your system supports one power supply rated at an output of 800 W.
NOTICE: To ensure proper system cooling, the power supply blank must be installed on the unoccupied power
supply bay.

Removing the Power Supply

1Turn off the system and all attached peripherals.
2Disconnect the power cable from the power outlet and the power supply, and remove the cable
from the cable retention bracket.
3Open the system. See "Opening the System" on page 48.
4
Remove the expansion-bay and processor-cooling fans (FAN1, FAN2, and FAN3). See "Removing and
Installing a Fan" on page53.
5
Remove the center fan bracket. See "Removing the Center Fan Bracket" on page79.
6
Disconnect the power cables from the following components where applicable (see Figure6-2 for
connector locations):
• PWR1 connector on the system board
• PWR2 connector on the system board
• PWR CTRL connector on the system board
• Hard drives
• Diskette drive
• Optical drive
• Tape backup unit
• Cable retention clips on the chassis (see Figure3-4)
7Remove the four screws securing the power supply to the back panel. See Figure3-4.
8
Slide the power supply from the system.