Dell R805 manual Troubleshooting External Connections, Troubleshooting the Video Subsystem

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Table 4-2. IRQ Assignment Defaults

IRQ Line	Assignment

IRQ0	System timer
IRQ1	Keyboard controller

IRQ2	Interrupt controller 1 to enable IRQ8 through IRQ15

IRQ3	Serial port 2 (COM2 and COM4)

IRQ4	Serial port 1 (COM1 and COM3)

IRQ5	Remote access controller

IRQ6	Reserved

IRQ7	Reserved

IRQ8	Real-time clock
IRQ9	ACPI functions (used for power management)

IRQ10	Available

IRQ11	Available

IRQ12	Reserved

IRQ13	Math coprocessor

IRQ14	IDE CD drive controller

IRQ15	Available

Troubleshooting External Connections

Loose or improperly connected cables are the most likely source of problems for the system, monitor, and other peripherals (such as a printer, keyboard, mouse, or other external device). Ensure that all external cables are securely attached to the external connectors on your system. See Front-Panel Features and Indicators and Back-Panel Features and Indicators for the front- and back-panel connectors on your system.

Troubleshooting the Video Subsystem

Problem

•Monitor is not working properly.

•Video memory is faulty.

Action

1.Check the system and power connections to the monitor.

2.Swap the monitor with another working monitor to see if this resolves the problem.

3.Determine whether the system has an expansion card with a video output connector.

In this system configuration, the monitor cable should normally be connected to the connector on the expansion card, not to the system's integrated video connector.

To verify that the monitor is connected to the correct video connector, turn off the system and wait for 1 minute, then connect the monitor to the other video connector and turn the system on again.

4.Determine whether the system has monitors attached to both the front and rear video connectors.

The system supports only one monitor attached to either the front or rear video connector. When a monitor is connected to the front panel, the back- panel video, keyboard, and mouse connectors are disabled.

If two monitors are attached to the system, disconnect one monitor. If the problem is not resolved, continue to the next step.

5.If possible, run the appropriate online diagnostic test. See Using Server Administrator Diagnostics.

If the tests run successfully, the problem is not related to video hardware.

If the tests fail, see Getting Help.

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Contents Page Accessing System Features During Startup Keystrokes for Accessing System FeaturesBack to Contents Other Information You May NeedFront-Panel Features and Indicators Indicator, Button, or Icon Description ConnectorBack-Panel Features and Indicators Hard-Drive Indicator CodesHard-Drive Indicator Patterns for RAID Condition Drive-Status Indicator PatternPower Indicator Codes NIC Indicator CodesConnecting External Devices Redundant Power Supply IndicatorsNIC Indicator Codes Indicator Indicator CodeLCD Status Messages LCD Status MessagesSee Troubleshooting System Cooling Problems Troubleshooting System Cooling ProblemsTroubleshooting the Microprocessors See Troubleshooting the MicroprocessorsSee Troubleshooting a Hard Drive Install memory. See Installing Memory ModulesSee Troubleshooting System Memory Daughter CardSolving Problems Described by LCD Status Messages System MessagesRemoving LCD Status Messages System MessagesTroubleshooting System Memory See Installing a RAC CardTroubleshooting Your System for any faulty components Troubleshooting a Hard Drive. See Using the System SetupUSB Device, or Troubleshooting a Hard Drive for See Troubleshooting a USB Device or Troubleshooting a HardCombination. See Installing a Processor See Troubleshooting the System BatteryDiagnostics Messages Alert MessagesBack to Contents Using Server Administrator Diagnostics System Diagnostics FeaturesWhen to Use the System Diagnostics Running the System DiagnosticsUsing the Custom Test Options Selecting Devices for TestingSelecting Diagnostics Options System Diagnostics Testing OptionsContacting Dell Contacting DellVisit support.dell.com Glossary Page Page System memory See RAM Back to Contents Installing System Components Recommended Tools Inside the SystemFront Bezel Opening and Closing the System Removing the Front BezelReplacing the Front Bezel Opening the SystemHard Drives Closing the SystemInstalling a Drive Blank Installing a Hot-Plug Hard DriveRemoving a Drive Blank Removing a Hot-Plug Hard DriveInstalling a Hard Drive Into a Drive Carrier Replacing a Hard-Drive CarrierRemoving a Hard Drive From a Hard-Drive Carrier Power Supplies Removing a Power SupplyReplacing a Power Supply Removing the Power Supply BlankInstalling the Power Supply Blank Internal SD CardInstalling the SD Card System FansRemoving a System Fan Installing a SAS Controller Daughter Card SAS Controller Daughter CardReplacing a Cooling Fan Removing a SAS Controller Daughter Card 11. SAS Controller Daughter Card CablingRAID Battery Configuring the Boot DeviceInternal USB Memory Key Connector Installing a RAID BatteryInstalling the Optional Internal USB Memory Key Expansion CardsExpansion Card Installation Guidelines Installing an Expansion CardRemoving an Expansion Card Cooling Shrouds Removing the Memory Module Cooling ShroudsInstalling the Processor Cooling Shroud Installing the Memory Module Cooling ShroudsRemoving the Processor Cooling Shroud Fan Brackets Removing the Fan BracketsReplacing the Fan Bracket Expansion-Card Risers Removing Expansion-Card RiserReplacing Expansion-Card Riser Removing the Riser 2 Board From the Expansion-Card Bracket 18. Removing and Replacing Expansion-Card RiserRAC Card Replacing the Riser 2 Board on the Expansion-Card BracketRemoving the RAC Card Installing a RAC Card 20. Removing and Installing a RAC CardLOM Daughter Card Removing the LOM Daughter CardInstalling the Optical Drive Optical DriveReplacing the LOM Daughter Card Removing the Optical Drive from the System22. Removing and Installing the Optical Drive Tray Removing the Optical Drive From the Optical Drive TrayInstalling an Optical Drive Into the Optical Drive Tray General Memory Module Installation GuidelinesMemory Configurations System MemoryInstalling Memory Modules Memory Sparing ConfigurationsMemory Sparing Support 25. Installing and Removing a Memory Module Removing Memory ModulesIntegrated NIC TOE ProcessorsRemoving a Processor Installing a Processor 26. Installing and Removing the Heat SinkSystem Battery Replacing the System BatterySideplane Board Removing the Sideplane BoardInstalling the Sideplane Board SAS/SATA Backplane BoardRemoving the SAS/SATA Backplane Board Control Panel Assembly Installing the SAS/SATA Backplane BoardRemoving the Control Panel Assembly Installing the Control Panel AssemblySystem Board Removing the System BoardInstalling the System Board Replace the sideplane. See Installing the Sideplane BoardJumper Setting Description System Board JumpersSystem Board Connectors Connector DescriptionSAS/SATA Backplane Board Connectors Sideplane Board ConnectorsDisabling a Forgotten Password Expansion-Card Riser-Board Components and PCIe BusesOpen the system. See Opening and Closing the System Back to Contents Entering the System Setup Program System Setup OptionsResponding to Error Messages Using the System Setup ProgramSystem Setup Program Options Using the System Password and Using the Setup PasswordMemory Information Screen Memory Information ScreenCPU Information Screen Integrated Devices ScreenCPU Information Screen Serial Communication Screen System Security ScreenIntegrated Devices Screen Options Serial Communication Screen OptionsSystem and Setup Password Features EnabledDisabled Exit ScreenUsing the System Password Assigning a System Password Using the Setup Password Deleting or Changing an Existing System PasswordBaseboard Management Controller Configuration Entering the BMC Setup ModuleBMC Setup Module Options See Disabling a Forgotten PasswordSafety First-For You and Your System Troubleshooting IRQ Assignment ConflictsStart-Up Routine Checking the EquipmentTroubleshooting External Connections Troubleshooting the Video SubsystemIRQ Assignment Defaults IRQ Line AssignmentTroubleshooting Basic I/O Functions Troubleshooting the KeyboardTroubleshooting the Mouse Troubleshooting a Serial I/O Device Troubleshooting a USB DeviceTroubleshooting a NIC Troubleshooting a Wet SystemClose the system. See Opening and Closing the System Troubleshooting a Damaged System Troubleshooting the System BatteryTroubleshooting Power Supplies Troubleshooting System Cooling ProblemsTroubleshooting System Memory Troubleshooting a FanTroubleshooting an SD Card or Internal USB Key Troubleshooting an Optical Drive Troubleshooting an External Tape DriveTroubleshooting a Hard Drive Remove the bezel. See Removing the Front BezelTroubleshooting a SAS Controller Daughter Card Troubleshooting Expansion Cards Troubleshooting the Microprocessors

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