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Dell 4691901 owner manual Troubleshooting Steps

Models: 4691901

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Power Button

Problem Description Troubleshooting Steps

LED

Power Button

Problem Description

Troubleshooting

Steps

A possible system board failure has occurred.

Unplug the computer. Allow one minute for the power to drain. Plug the computer into a working electrical outlet and press the power button.

A possible system board, power supply, or peripheral failure has occurred.

•Power off computer, leaving the computer plugged in. Press and hold the power supply test button at the rear of the power supply unit. If the LED next to the switch illuminates, the problem may be with your system board.

•If the LED next to the switch does not illuminate, disconnect all internal and external peripherals, and press and hold the power supply test button. If it illuminates, there could be a problem with a peripheral.

•If the LED still does not illuminate, remove the PSU connections from the system board, then press and hold the power supply button. If it illuminates, there could be a problem with the system board.

•If the LED still does not illuminate, the problem is with the power supply.

LED

Power Button

Problem Description Troubleshooting Steps

LED

Power Button

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

•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. If only one memory module is installed, try moving it to a different DIMM connector and re-start the computer.

•If available, install verified working memory of the same type into your computer.

Problem Description BIOS may be corrupt or missing.

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Dell 4691901 owner manual Troubleshooting Steps

Contents

Regulatory Model D07D Regulatory Type D07D001 Dell Inc Contents System Setup TroubleshootingSpecifications Contacting DellPage Working on Your Computer Before Working Inside Your ComputerTurning Off Your Computer After Working Inside Your ComputerInstalling The Cover Removing the CoverRelated Links Installing The Front Bezel Removing the Front BezelRemoving the Expansion Card Page Installing The Expansion Card Removing the Optical DriveInstalling The Optical Drive Removing the Hard DrivePage Installing The Hard Drive Removing the MemoryInstalling The Memory Removing the Chassis Intrusion SwitchInstalling The Chassis Intrusion Switch Removing The SpeakerInstalling The Speaker Removing The Heat Sink and Processor Installing The Heat Sink and Processor Removing The Coin-Cell Battery Installing The Coin-Cell BatteryRemoving The Power-Switch Cable Installing The Power-Switch Cable Removing The Front Thermal Sensor Installing The Front Thermal Sensor Removing The System FanInstalling The System Fan Installing The System Fan Removing The Input/Output PanelDisconnect the 4-pin power cable from the system board Installing The Input/Output PanelRemoving The Power Supply Remove the Input/Output panelPage Installing The Power Supply Removing the System Board Remove the expansion cardsInstalling the System Board Removing The PSU Thermal SensorRemove the system board from the chassis Installing The PSU Thermal Sensor Boot Menu Enhancements System SetupBoot Menu CtrlAltF8 One-time boot and diagnostics utility menu F12Navigation Beep Codes and Text Error MessagesTiming Key Sequences Action KeystrokeSystem Setup Options Security They are set. This option is disabled by default Password BypassPassword prompts during a system restart Password ChangesPower Management PerformancePost Behavior Enable F12 Boot menu enabled by defaultMaintenance Virtualization SupportSystem Logs Diagnostic LEDs Diagnostic Light PatternsPower Button Troubleshooting Steps If the problem persists, the system board is faulty Re-seat the 2x2 power connector from the power supply unitPower Button Problem Description Possible system board failure has occurredReinstalled all modules without error Problem Description Troubleshooting Steps Beep Codes Code Cause Microprocessor register failureCode Cause DMA initialization failure Code Through CauseCode Cause Code Cause No time tick Shutdown failure Gate A20 failure Error MessagesAddress mark not found Code Cause Time-of-day clock stoppedBad error-correction code ECC on disk read Alert! Security override Jumper is installedBad command or file name Data errorDiskette drive 0 seek failure Diskette subsystem reset failedHard-disk drive configuration error Diskette read failureMemory allocation error Invalid configuration information-please run Setup programInvalid Memory configuration, please populate DIMM1 Keyboard failureNo timer tick interrupt No boot device availableNo boot sector on hard-disk drive Non-system disk or disk errorSeek error Read faultReset failed Time-of-day not set-please run the System Setup programWrite fault on selected drive Unexpected interrupt in protected modeWrite fault \ is not accessible. The device is not readyProcessor SpecificationSystem Information MemoryExpansion Bus AudioNetwork CardsMini-Tower Two Desktop One Small Form Factor External ConnectorsSystem Board Connectors Audio Back Panel Mini-Tower/DesktopControls and Lights Physical Height Width Depth Weight EnvironmentalPage Contacting Dell Visit support.dell.com