Dell 4691901 owner manual Timing Key Sequences, Beep Codes and Text Error Messages, Navigation

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Since the one-time boot menu only affects the current boot, it has the added benefit of not requiring the technician to restore the customer's boot order after completing troubleshooting.

Timing Key Sequences

The keyboard is not the first device initialized by Setup. As a result, if you press a keystroke too early, you lock out the keyboard. When this happens, a keyboard error message appears on the monitor, and you cannot restart the system with the <Ctrl><Alt><Del> keys.

To avoid this scenario, wait until the keyboard is initialized before pressing the keystroke. There are two ways to know that this has happened:

•The keyboard lights flash.

•The "F2=Setup" prompt appears in the top right-hand corner of the screen during boot.

The second method is good if the monitor is already warmed up. If it is not, the system often passes the window of opportunity before the video signal is visible. If this is the case, rely on the first method—the keyboard lights—to know the keyboard is initialized.

Beep Codes and Text Error Messages

The OptiPlex BIOS is capable of displaying error messages in plain English, along with beep codes. If the BIOS determine the previous boot was unsuccessful, it displays an error message similar to the following:

Previous attempts at booting the system have failed at checkpoint ______. For

help resolving this problem, please note this checkpoint and contact Dell Technical Support.

Navigation

The computer setup can be navigated by either the keyboard or the mouse.

Use the following keystrokes to navigate the BIOS screens:

Action	Keystroke

Expand and collapse field	<Enter>, left- or right-arrow key, or +/–
Expand or collapse all fields	< >

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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 ComputerRemoving the Cover Installing The CoverRelated Links Removing the Front Bezel Installing 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 Installing The Coin-Cell Battery Removing 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 cardsRemoving The PSU Thermal Sensor Installing the System BoardRemove 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 Light Patterns Diagnostic LEDsPower 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 Through Cause Code Cause DMA initialization failureCode 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