Dell Precision Workstation 450 Service Manual page 65

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Power Supply — Dell Precision™ 650 Computer
Dell Precision™ Workstation 650 and Dell Precision Workstation 450 Service Manual
Removing the Power Supply
Replacing the Power Supply
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the System Information Guide.
Removing the Power Supply
NOTICE: Before disconnecting a device from the computer, wait 10 to 20 seconds after disconnecting the computer from its electrical outlet. Before
removing a component from the system board, verify that the standby power light on the system board has turned off. To locate this light, see
Board Components."
1. Remove the cards and the card fan.
2. Disconnect the power supply cables and the card fan cable.
1 fan-guide release button
2 drive power cable
3 card fan cable
4 power supply cables
3. Remove the card fan guide:
a. Pull up on the fan-guide release button.
b. Slide the card fan guide to the right.
c. Lift the card fan guide out of the four securing slots in the computer.
4. While pressing the power-supply release button, slide the power supply toward the back of the computer.
"System