Dell 4691901 owner manual Re-seat the 2x2 power connector from the power supply unit

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Troubleshooting Steps The computer hardware is operating normally but the BIOS may be corrupt or missing.

LED

Power Button

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.
LED
Power Button
Problem Description	Power connector not installed properly.
Troubleshooting Steps	Re-seat the 2x2 power connector from the power supply unit.
LED
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.
LED
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.
	• If the problem persists, the system board is faulty.
LED

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Contents Regulatory Model D07D Regulatory Type D07D001 Dell Inc Contents Troubleshooting System SetupContacting Dell SpecificationsPage Before Working Inside Your Computer Working on Your ComputerAfter Working Inside Your Computer Turning Off Your ComputerRemoving the Cover Installing The CoverRelated Links Removing the Front Bezel Installing The Front BezelRemoving the Expansion Card Page Removing the Optical Drive Installing The Expansion CardRemoving the Hard Drive Installing The Optical DrivePage Removing the Memory Installing The Hard DriveRemoving the Chassis Intrusion Switch Installing The MemoryRemoving The Speaker Installing The Chassis Intrusion SwitchInstalling The Speaker Removing The Heat Sink and Processor Installing The Heat Sink and Processor Installing The Coin-Cell Battery Removing The Coin-Cell BatteryRemoving The Power-Switch Cable Installing The Power-Switch Cable Removing The Front Thermal Sensor Removing The System Fan Installing The Front Thermal SensorInstalling The System Fan Removing The Input/Output Panel Installing The System FanRemove the Input/Output panel Installing The Input/Output PanelRemoving The Power Supply Disconnect the 4-pin power cable from the system boardPage Installing The Power Supply Remove the expansion cards Removing the System BoardRemoving The PSU Thermal Sensor Installing the System BoardRemove the system board from the chassis Installing The PSU Thermal Sensor CtrlAltF8 One-time boot and diagnostics utility menu F12 System SetupBoot Menu Boot Menu EnhancementsAction Keystroke Beep Codes and Text Error MessagesTiming Key Sequences NavigationSystem Setup Options Security Password Changes Password BypassPassword prompts during a system restart They are set. This option is disabled by defaultPerformance Power ManagementVirtualization Support Enable F12 Boot menu enabled by defaultMaintenance Post BehaviorSystem Logs Diagnostic Light Patterns Diagnostic LEDsPower Button Troubleshooting Steps Possible system board failure has occurred Re-seat the 2x2 power connector from the power supply unitPower Button Problem Description If the problem persists, the system board is faultyReinstalled all modules without error Problem Description Troubleshooting Steps Code Cause Microprocessor register failure Beep CodesCode Through Cause Code Cause DMA initialization failureCode Cause Code Cause Time-of-day clock stopped Error MessagesAddress mark not found Code Cause No time tick Shutdown failure Gate A20 failureData error Alert! Security override Jumper is installedBad command or file name Bad error-correction code ECC on disk readDiskette read failure Diskette subsystem reset failedHard-disk drive configuration error Diskette drive 0 seek failureKeyboard failure Invalid configuration information-please run Setup programInvalid Memory configuration, please populate DIMM1 Memory allocation errorNon-system disk or disk error No boot device availableNo boot sector on hard-disk drive No timer tick interruptTime-of-day not set-please run the System Setup program Read faultReset failed Seek error\ is not accessible. The device is not ready Unexpected interrupt in protected modeWrite fault Write fault on selected driveMemory SpecificationSystem Information ProcessorCards AudioNetwork Expansion BusAudio Back Panel Mini-Tower/Desktop External ConnectorsSystem Board Connectors Mini-Tower Two Desktop One Small Form FactorControls and Lights Environmental Physical Height Width Depth WeightPage Visit support.dell.com Contacting Dell