Dell 990 service manual Beep Codes, Code1-1-2

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Troubleshooting Steps

LED

Power Button

–Clear CMOS.

–Disconnect all internal and external peripherals, and restart the computer. If the computer boots, add the peripheral cards back one by one until you find the bad one.

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

Problem	Some other failure has occurred.
Description

Troubleshooting Steps

Beep Codes

–Ensure that the display/monitor is plugged into a discrete graphic card.

–Ensure that all hard drives and optical drive cables are properly connected to the system board.

–If there is an error message on the screen identifying a problem with a device ( hard drive), check the device to make sure it is functioning properly.

–If the operating system is attempting to boot from a device (optical drive), check system setup to ensure the boot sequence is correct for the devices installed on your computer.

The computer can emit a series of beeps during start-up if the display cannot show errors or problems. These series of beeps, called beep codes, identify various problems. The delay between each beep is 300 ms, the delay between each set of beeps is 3 sec, and the beep sound lasts 300 ms. After each beep and each set of beeps, the BIOS should detect if the user presses the power button. If so, BIOS will jump out from looping and execute the normal shutdown process and power system.

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Contents Regulatory Model D05D Regulatory Type D05D001 Page Contents Chassis Intrusion Switch Coin-Cell BatteryPower-Switch Cable SpeakerPower Supply Power Supply Unit PSU Thermal SensorSystem Setup TroubleshootingMemory allocation error No timer tick interruptDecreasing available memory Diskette read failureSpecifications Contacting DellPage Working on Your Computer Before Working Inside Your ComputerRecommended Tools Turning Off Your ComputerAfter Working Inside Your Computer Page Removing the Cover Installing The CoverCover Follow the procedures in After Working Inside Your Computer Front Bezel Removing the Front BezelInstalling The Front Bezel Cards Removing the Expansion CardPage Installing The Expansion Card Page Optical Drive Removing the Optical DriveInstalling The Optical Drive Hard Drive Removing the Hard DrivePage Installing The Hard Drive Page Memory Removing the MemoryInstalling The Memory Chassis Intrusion Switch Removing the Chassis Intrusion SwitchInstalling The Chassis Intrusion Switch Speaker Removing The SpeakerInstalling The Speaker Heat Sink Removing The Heat Sink and ProcessorPage Installing The Heat Sink and Processor Page Coin-Cell Battery Removing The Coin-Cell BatteryInstalling The Coin-Cell Battery Power-Switch Cable Removing The Power-Switch CableInstalling The Power-Switch Cable Front Thermal Sensor Removing The Front Thermal SensorInstalling The Front Thermal Sensor Chassis Fan Removing The System FanInstalling The System Fan Follow the procedures in After Working Inside Your Computer Page Input/Output Panel Removing The Input/Output PanelInstalling The Input/Output Panel Remove the Input/Output panelPower Supply Removing The Power SupplyPage Installing The Power Supply Lift the power supply out of the computerPage System Board Removing The System BoardInstalling The System Board Follow the procedures in After Working Inside Your Computer Page Power Supply Unit PSU Thermal Sensor Removing The PSU Thermal SensorInstalling The PSU Thermal Sensor System Setup System SetupBoot Menu Boot Menu EnhancementsTiming Key Sequences Navigation Beep Codes and Text Error MessagesSystem Setup Options Technology SATA-2, SATA-3, and LOM MAC AddressSystem Configuration Video SecurityAllow Non-Admin Password Changes This option is Performance Power Management Protector or if Auto Power is set to disabledEnable F12 Boot menu enabled by default Post BehaviorMaintenance Virtualization SupportImage Server Address isSystem Logs Setting is255.255.255.255 Displays the Bios Progress event log Clear LogPage Troubleshooting Diagnostic LEDsDiagnostic Light Patterns Power Button ProblemPower Button StepsPower Button Problem Description LED If the problem persists, the system board is faulty Troubleshooting Steps Re-seat the processorTroubleshooting Steps Your computer Possible expansion card failure has occurredBeep Codes Code1-1-2Cause Code CauseCode Cause DMA page register read/write failure Through CodeCause Keyboard Controller Test failure Code Code Cause Cache test failure Error MessagesAddress mark not found Alert! Security override Jumper is installed Bad command or file nameBad error-correction code ECC on disk read Data errorDiskette subsystem reset failed Hard-disk drive configuration errorDecreasing available memory Diskette drive 0 seek failureInvalid configuration information-please run Setup program Invalid Memory configuration, please populate DIMM1Hard-disk drive controller failure Hard-disk drive failureMemory allocation error Memory size in Cmos invalidNo boot device available No boot sector on hard-disk driveNo timer tick interrupt Non-system disk or disk errorRead fault Reset failedSeek error Requested sector not foundTime-of-day not set-please run the System Setup program Timer chip counter 2 failedUnexpected interrupt in protected mode Write faultWrite fault on selected drive \ is not accessible. The device is not readyPage Specifications Technical SpecificationsProcessor TypeAudio NetworkSystem Information Expansion BusPCI External Connectors DrivesConnector System Board ConnectorsFactor Back Panel Ultra Small Form Factor Front Panel Video Vary based on the graphics cardSmall Form Factor Ultra Small Form Factor Controls and Lights Power system by System power supplyTurned on and is functional. OutletEnvironmental Power Wattage Maximum Voltage Heat DissipationPhysical Height Width Depth Weight Storage Grms Maximum shock Operating 40 G 105 G Altitude Airborne contaminant levelS71.04-1985 102Visit support.dell.com Contacting DellContacting Dell