Led | Dell 990 instruction

Problem Description A possible system board failure has occurred.

Troubleshooting Steps Remove all peripheral cards from the PCI and PCI-E slots and re-start the computer. If the computer boots, add the peripheral cards back one by one until you find the bad one.

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Power Button

Problem Description Power connector not installed properly.

Troubleshooting Steps Re-seat the 2x2 power connector from the power supply unit.

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Power Button

Problem Description Possible peripheral card or system board failure has occurred.

Troubleshooting Steps Remove all peripheral cards from the PCI and PCI-E slots and re-start the computer. If the computer boots, add the peripheral cards back one by one until you find the bad one.

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Power Button

Problem Description A possible system board failure has occurred.

Troubleshooting Steps – Disconnect all internal and external peripherals, and re-start the computer. If the computer boots, add the peripheral cards back one by one until you find the bad one.

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Dell 990 service manual Led

Contents

Regulatory Model D05D Regulatory Type D05D001 Page Contents Chassis Intrusion Switch Coin-Cell BatteryPower-Switch Cable Speaker Power Supply Power Supply Unit PSU Thermal SensorSystem Setup Troubleshooting Memory allocation error No timer tick interruptDecreasing available memory Diskette read failure Specifications Contacting DellPage Working on Your Computer Before Working Inside Your Computer Recommended Tools Turning Off Your Computer After Working Inside Your Computer Page Cover Installing The CoverRemoving the Cover Follow the procedures in After Working Inside Your Computer Front Bezel Removing the Front Bezel Installing The Front Bezel Cards Removing the Expansion CardPage Installing The Expansion Card Page Optical Drive Removing the Optical Drive Installing The Optical Drive Hard Drive Removing the Hard DrivePage Installing The Hard Drive Page Memory Removing the Memory Installing The Memory Chassis Intrusion Switch Removing the Chassis Intrusion Switch Installing The Chassis Intrusion Switch Speaker Removing The Speaker Installing The Speaker Heat Sink Removing The Heat Sink and ProcessorPage Installing The Heat Sink and Processor Page Coin-Cell Battery Removing The Coin-Cell Battery Installing The Coin-Cell Battery Power-Switch Cable Removing The Power-Switch Cable Installing The Power-Switch Cable Front Thermal Sensor Removing The Front Thermal Sensor Installing The Front Thermal Sensor Chassis Fan Removing The System Fan Installing The System Fan Follow the procedures in After Working Inside Your Computer Page Input/Output Panel Removing The Input/Output Panel Installing The Input/Output Panel Remove the Input/Output panel Power Supply Removing The Power SupplyPage Installing The Power Supply Lift the power supply out of the computerPage System Board Removing The System Board Installing The System Board Follow the procedures in After Working Inside Your Computer Page Power Supply Unit PSU Thermal Sensor Removing The PSU Thermal Sensor Installing The PSU Thermal Sensor System Setup System SetupBoot Menu Boot Menu Enhancements Timing Key Sequences System Setup Options Beep Codes and Text Error MessagesNavigation Technology SATA-2, SATA-3, and LOM MAC Address System Configuration Video Security Allow Non-Admin Password Changes This option is Performance Power Management Protector or if Auto Power is set to disabled Enable F12 Boot menu enabled by default Post Behavior Maintenance Virtualization SupportImage Server Address is 255.255.255.255 Setting isSystem Logs Displays the Bios Progress event log Clear LogPage Troubleshooting Diagnostic LEDsDiagnostic Light Patterns Power Button Problem Power Button Steps Power Button Problem Description LED If the problem persists, the system board is faulty Troubleshooting Steps Re-seat the processor Troubleshooting Steps Your computer Possible expansion card failure has occurred Beep Codes Code1-1-2 Cause Code CauseCode Cause DMA page register read/write failure Through Code Cause Keyboard Controller Test failure Code Address mark not found Error MessagesCode Cause Cache test failure Alert! Security override Jumper is installed Bad command or file nameBad error-correction code ECC on disk read Data error Diskette subsystem reset failed Hard-disk drive configuration errorDecreasing available memory Diskette drive 0 seek failure Invalid configuration information-please run Setup program Invalid Memory configuration, please populate DIMM1Hard-disk drive controller failure Hard-disk drive failure Memory allocation error Memory size in Cmos invalid No boot device available No boot sector on hard-disk driveNo timer tick interrupt Non-system disk or disk error Read fault Reset failedSeek error Requested sector not found Time-of-day not set-please run the System Setup program Timer chip counter 2 failedUnexpected interrupt in protected mode Write fault Write fault on selected drive \ is not accessible. The device is not readyPage Specifications Technical SpecificationsProcessor Type Audio NetworkSystem Information Expansion Bus PCI External Connectors Drives Connector System Board ConnectorsFactor Back Panel Ultra Small Form Factor Front Panel Video Vary based on the graphics card Small Form Factor Ultra Small Form Factor Controls and Lights Power system by System power supplyTurned on and is functional. Outlet Physical Height Width Depth Weight Power Wattage Maximum Voltage Heat DissipationEnvironmental Storage Grms Maximum shock Operating 40 G 105 G Altitude Airborne contaminant levelS71.04-1985 102 Contacting Dell Contacting DellVisit support.dell.com