Dell C521 specifications Replacing the Power Supply

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1

heat sink assembly

2

heat-sink assembly bracket

3

captive screws (2)

 

 

 

 

 

 

10. Replace the computer cover. See Replacing the Computer Cover.

NOTICE: To connect a network cable, first plug the cable into the network port or device and then plug it into the computer.

11. Connect your computer and devices to electrical outlets, and turn them on.

Power Supply

Replacing the Power Supply

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

1.Follow the procedures in Before You Begin.

2.Disconnect the DC power cables from the system board and the drives.

Note the routing of the DC power cables underneath the tabs in the computer chassis as you remove them from the system board and drives. You must route these cables properly when you replace them to prevent their being pinched or crimped.

3.Remove the two screws that attach the power supply to the back of the computer chassis.

4.Press the release button located on the floor of the computer chassis.

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Contents September 2006 Rev. A00 Front View About Your ComputerBack View of the Computer Back Panel I/O ConnectorsBack to Contents Turning Off Your Computer Before You BeginGetting Started Recommended ToolsPage Replacing the Computer Cover Removing the Computer Cover Removing and Installing Parts MemoryDDR2 Memory Overview Installing Memory Removing Memory CardsInstalling an Expansion Card Removing an Expansion Card Drives Connecting and Disconnecting Drive Cables General Installation GuidelinesDrive Interface Connectors Power Cable ConnectorInstalling a CD/DVD Drive CD/DVD DriveRemoving a CD/DVD Drive Removing a Floppy Drive Floppy DriveInstalling a Floppy Drive Removing a Media Card Reader Media Card ReaderInstalling a Media Card Reader Removing a Hard Drive Hard DriveInstalling a Hard Drive Replacing the Battery BatteryRemoving the Processor ProcessorInstalling the Processor Page Replacing the Power Supply Power SupplyRemoving the Front I/O Panel Front I/O PanelFan Assembly Installing the Front I/O PanelRemoving the Fan Assembly Installing the Fan Assembly System BoardRemoving the System Board Replacing the System Board Page Specifications Connectors DrivesControls and Lights Power PhysicalEnvironmental Overview System SetupEntering System Setup OverviewSystem System Setup Options64MB Post Behavior Boot MenuJumper Locations Clearing Password Settings Clearing Forgotten Passwords and Cmos SettingsClearing Cmos Settings Flashing the BiosTechnical Overview Inside View of Your ComputerSystem Board Components Jumper Setting Description Jumper SettingsPower Supply DC Connector Pin Assignments DC Power Connector P1Pin Number Signal name AWG Wire DC Power Connector P5 and P6 DC Power Connector P2DC Power Connector P3 DC Power Connector P4Black +12 VDC Yellow September 2006 Rev. A00 Dell Diagnostics Main Menu TroubleshootingDell Diagnostics When to Use the Dell DiagnosticsSystem Lights Diagnostic LightsPower Light Problem Description Suggested Resolution Problem Description Suggested ResolutionCode Cause Beep Codes