Dell E520 service manual Advanced Troubleshooting, Power Lights

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Advanced Troubleshooting: Dell Dimension E520 Service Manual

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Advanced Troubleshooting

Dell™ Dimension™ E520 Service Manual

Power Lights

Diagnostic Lights

Beep Codes

System Messages

Dell Diagnostics

Drivers

Resolving Software and Hardware Incompatibilities

Power Lights

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

The power button light located on the front of the computer illuminates and blinks or remains solid to indicate different states:

If the power light is green and the computer is not responding:

Ensure the display is connected and powered on.

If the display is connected and powered on see Diagnostic Lights.

If the power light is blinking green, the computer is in standby mode. Press a key on the keyboard, move the mouse, or press the power button to resume normal operation.

If the power light is off, the computer is either turned off or is not receiving power.

Reseat the power cable in the power connector on the back of the computer and the electrical outlet.

If the computer is plugged into a power strip, ensure that the power strip is plugged into an electrical outlet and that the power strip is turned on. Also, bypass power protection devices, power strips, and power extension cables to verify that the computer turns on properly.

Ensure that the electrical outlet is working by testing it with another device, such as a lamp.

Ensure that the main power cable and front panel cable are securely connected to the system board (see System Board Components).

If the power light is blinking amber, the computer is receiving electrical power, but an internal power problem might exist.

Ensure that the voltage selection switch is set to match the AC power at your location (if applicable).

If the power light is steady amber, a device might be malfunctioning or incorrectly installed.

Remove and then reinstall the memory modules (see Memory).

Remove and then reinstall any cards (see Cards).

Remove and then reinstall the graphics card, if applicable (see Cards).

Ensure that all power cables are securely connected to the system board (see System Board Components).

file:///T/htdocs/systems/dimE520/en/SM_EN/adtshoot.htm[10/16/2012 1:04:50 PM]

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Contents Model Dcta July 2006 Rev. A00 Turning Off Your Computer Getting StartedRecommended Tools Before Working Inside Your ComputerBack to Contents About Your Computer Front View of the ComputerBack View of the Computer Back Panel Connectors Has been securely attached VGA connector Inside View of Your Computer System Board ComponentsPower Supply DC Connector Pin Assignments ClrpswdDC Power Connector P1 Pin Number Signal Name Color Wire GaugeDC Power Connector P2 DC Power Connect P3, P5, P8, and P9Pin Number Signal Name AWG Wire DC Power Connector P7 DC Power Connector P10Processor MemoryComputer Information Expansion Bus VideoAudio DrivesConnectors PowerControls and Lights Physical EnvironmentalAdvanced Troubleshooting Power LightsDiagnostic Lights Problem Description Suggested ResolutionBeep Codes Code CausePossible Cause System MessagesMessage Corrective ActionDell Diagnostics Starting the Dell DiagnosticsDell Diagnostics Main Menu Option FunctionTab Function Drivers What Is a Driver?Reinstalling Drivers Identifying DriversResolving Software and Hardware Incompatibilities Click Roll Back DriverClick Start, then click Help and Support Entering System Setup System Setup ScreensOverview System Setup Options SystemOnboard Devices Boot Sequence Option SettingsChanging Boot Sequence for the Current Boot Changing Boot Sequence for Future BootsClearing Forgotten Passwords Clearing Cmos Settings Flashing the BiosClick Save this program to disk, and then click OK Back to Contents Removing and Installing Parts Removing the Computer CoverInside View of Your Computer System Board Components Usbback Memory DDR2 Memory OverviewAddressing Memory With 4-GB Configurations Installing MemoryRemoving Memory Cards PCI CardsRelease tab Bracket caught outside of slot Removing a PCI Card Installing a PCI Express Card PCI Express CardsPage Page Removing a PCI Express Card Drive Panel Removing the Drive PanelInstalling the Drive-Panel Insert Removing the Drive-Panel InsertInstalling the Drive Panel DrivesConnecting Drive Cables Drive Interface ConnectorsHard Drive Removing a Hard DriveInstalling a Hard Drive Drive Adding a Second Hard Drive Floppy Drive Removing a Floppy DriveInstalling a Floppy Drive Shoulder screws Media Card Reader Removing a Media Card ReaderInstalling a Media Card Reader Reader Media Card Reader Screws CD/DVD Drive Removing a CD/DVD DriveInstalling a CD/DVD Drive Screws Battery Replacing the BatteryPower Supply Removing the Power SupplyInstalling the Power Supply ProcessorRemoving the Processor Processor socket Installing the Processor Panel Panel Components Removing the I/O PanelInstalling the I/O Panel Processor FanRemoving the Processor Fan Page Installing the Processor Fan System BoardRemoving the System Board Installing the System Board Replacing the Computer Cover
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