If the problem persists, the system board is faulty | Dell 990

–If the problem persists, the system board is faulty.

LED

Power Button

Problem Description A possible coin cell battery failure has occurred.

Troubleshooting Steps Remove the coin cell battery for one minute, reinstall the battery, and restart.

LED

Power Button
Problem Description	A possible processor failure has occurred.
Troubleshooting Steps	Re-seat the processor.
LED
Power Button

Problem Description Memory modules are detected, but a memory failure has occurred.

Troubleshooting Steps

–If two or more memory modules are installed, remove the modules, then re-install one module and re-start the computer. If the computer starts normally, continue to install additional memory modules (one at a time) until you have identified a faulty module or reinstalled all modules without error.

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Dell 990 service manual If the problem persists, the system board is faulty, Troubleshooting Steps Re-seat the processor

Contents

Regulatory Model D05D Regulatory Type D05D001 Page Contents Coin-Cell Battery Chassis Intrusion SwitchPower-Switch Cable Speaker Power Supply Unit PSU Thermal Sensor Power SupplySystem Setup Troubleshooting No timer tick interrupt Memory allocation errorDecreasing available memory Diskette read failure Contacting Dell SpecificationsPage Before Working Inside Your Computer Working on Your Computer Turning Off Your Computer Recommended Tools After Working Inside Your Computer Page Removing the Cover Installing The CoverCover Follow the procedures in After Working Inside Your Computer Removing the Front Bezel Front Bezel Installing The Front Bezel Removing the Expansion Card CardsPage Installing The Expansion Card Page Removing the Optical Drive Optical Drive Installing The Optical Drive Removing the Hard Drive Hard DrivePage Installing The Hard Drive Page Removing the Memory Memory Installing The Memory Removing the Chassis Intrusion Switch Chassis Intrusion Switch Installing The Chassis Intrusion Switch Removing The Speaker Speaker Installing The Speaker Removing The Heat Sink and Processor Heat SinkPage Installing The Heat Sink and Processor Page Removing The Coin-Cell Battery Coin-Cell Battery Installing The Coin-Cell Battery Removing The Power-Switch Cable Power-Switch Cable Installing The Power-Switch Cable Removing The Front Thermal Sensor Front Thermal Sensor Installing The Front Thermal Sensor Removing The System Fan Chassis Fan Installing The System Fan Follow the procedures in After Working Inside Your Computer Page Removing The Input/Output Panel Input/Output Panel Remove the Input/Output panel Installing The Input/Output Panel Removing The Power Supply Power SupplyPage Lift the power supply out of the computer Installing The Power SupplyPage Removing The System Board System Board Installing The System Board Follow the procedures in After Working Inside Your Computer Page Removing The PSU Thermal Sensor Power Supply Unit PSU Thermal Sensor Installing The PSU Thermal Sensor System Setup System SetupBoot Menu Boot Menu Enhancements Timing Key Sequences Navigation Beep Codes and Text Error MessagesSystem Setup Options SATA-2, SATA-3, and LOM MAC Address Technology System Configuration Security Video Allow Non-Admin Password Changes This option is Performance Protector or if Auto Power is set to disabled Power Management Post Behavior Enable F12 Boot menu enabled by default Virtualization Support MaintenanceImage Server Address is System Logs Setting is255.255.255.255 Clear Log Displays the Bios Progress event logPage Diagnostic LEDs TroubleshootingDiagnostic Light Patterns Power Button Problem Steps Power Button Power Button Problem Description LED Troubleshooting Steps Re-seat the processor If the problem persists, the system board is faulty Troubleshooting Steps Possible expansion card failure has occurred Your computer Code1-1-2 Beep Codes Code Cause CauseCode Cause DMA page register read/write failure Through Code Cause Keyboard Controller Test failure Code Code Cause Cache test failure Error MessagesAddress mark not found Bad command or file name Alert! Security override Jumper is installedBad error-correction code ECC on disk read Data error Hard-disk drive configuration error Diskette subsystem reset failedDecreasing available memory Diskette drive 0 seek failure Invalid Memory configuration, please populate DIMM1 Invalid configuration information-please run Setup programHard-disk drive controller failure Hard-disk drive failure Memory size in Cmos invalid Memory allocation error No boot sector on hard-disk drive No boot device availableNo timer tick interrupt Non-system disk or disk error Reset failed Read faultSeek error Requested sector not found Timer chip counter 2 failed Time-of-day not set-please run the System Setup programUnexpected interrupt in protected mode Write fault \ is not accessible. The device is not ready Write fault on selected drivePage Technical Specifications SpecificationsProcessor Type Network AudioSystem Information Expansion Bus PCI Drives External Connectors System Board Connectors ConnectorFactor 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 System power supply Power system byTurned on and is functional. Outlet Environmental Power Wattage Maximum Voltage Heat DissipationPhysical Height Width Depth Weight Airborne contaminant level Storage Grms Maximum shock Operating 40 G 105 G AltitudeS71.04-1985 102 Visit support.dell.com Contacting DellContacting Dell