Dell 100-Mbps manual Eliminating Resource Conflicts, Running the Diskette-Based Diagnostics

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To reseat the microprocessor, remove it from its socket and reinstall it as described in “Microprocessor/Heat Sink Assembly” in Chapter 4.

To reseat a DIMM, remove it from its socket and reinstall it as described in “DIMMs” in Chapter 4.

If you need to reseat an expansion card, use a 1/4-inch nut driver to remove the screw that secures the card-mounting bracket. Grasp the card by its top corners, and carefully pull it out of its connector. Reinsert the card in its connector, and carefully push it in until it is fully seated. Then reinstall the card-mounting bracket’s retaining screw.

4.Verify that all jumpers are set correctly.

For information about these jumpers, see “System Board Jumpers” in Chap- ter 1.

5.Check all cable connectors inside the system unit to verify that they are firmly attached to their appropriate connectors.

6.Reinstall the system unit cover.

7.Reconnect the system unit and any attached peripherals to their power sources, and turn them on.

Does the problem appear to be resolved?

Yes. No further steps are necessary. Terminate the procedure.

No. Proceed to “Eliminating Resource Conflicts,” “Running the Diskette- Based Diagnostics,” and to “Getting Help” found later in this chapter.

Eliminating Resource Conflicts

Devices within the system unit may require dedicated memory spaces, interrupt levels, or DMA channels, all of which must be allocated during installation of the devices. Because a device may be installed at a different time, it is possible that the same resource is assigned to two or more devices.

Resource conflicts can result in disorderly or erratic system operation or failure of the system to operate at all. If you suspect that resource conflicts might exist, check the system and reassign the resources as necessary.

Running the Diskette-Based Diagnostics

The diskette-based diagnostics (included with the system) contains tests that aid in troubleshooting all major components of the computer system.

CAUTION: To prevent damage to the original diagnostics diskette, always use a backup copy of the diagnostics diskette when servicing a user’s system. Dell recommends that users make several copies of this diskette to ensure that one is always available.

Basic Troubleshooting

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Contents 659,&0$18$ Page Contents Chapter Basic Troubleshooting Chapter Beep Codes and Error MessagesChapter Removing and Replacing Parts Figures Index16. Expansion-Card Cage Removal TablesPage Read This First System Overview System Features System Unit Orientation Front-Panel Features Advanced Expansion Subsystem Dual-Processor CapabilityEnhanced Dual-Interface Eide Subsystem Hard-Disk Drive OptionsAudio Controller PCI Video CardThermal Monitoring Desktop ChassisPin Assignments for the DC Power Connectors System Power SupplySystem Unit Smart SupportDC Power Connector P1 DC Power Connector P7 DC Power DistributionPower Distribution Video Memory System Board LayoutSystem Board Jumpers Main MemoryJumper Descriptions Interrupt AssignmentsIRQ14 DMA Channel AssignmentsTechnical Specifications Technical SpecificationsNIC CtrlAltEnter To 149 F Page Initial User Contact Basic TroubleshootingExternal Visual Inspection Observing the Boot Routine Internal Visual Inspection Eliminating Resource Conflicts Running the Diskette-Based DiagnosticsGetting Help Post Beep Codes Beep Codes and Error MessagesPost Beep Codes Halted System Error MessagesSystem Error Messages System could not suc System Setup program Incorrect configuration During memory test Faulty or improperly System does not recog Faulty diskette, diskette MS-DOS unable to Defective sectors on dis At system start-up One or both micro Recommended Tools Removing and Replacing PartsProtection of the Equipment Precautionary MeasuresPull the floor stand away from the system unit Floor StandSystem-Unit Cover Removal System Unit CoverEject, Power, and Reset Button Removal Eject, Power, and Reset ButtonsFront-Panel Insert Removal Front-Panel InsertsIndicator Card Removal Indicator CardSpeaker Removal SpeakerDrive Hardware Drives5-Inch Diskette Drive Removal Drives in the Drive Cage10 .25-Inch Drive Removal Lift the hard-disk drive bracket out of the system unit Hard-Disk Drives12. Hard-Disk Drive Removal 13. Power Supply Removal System Power Supply14. Microprocessor Fan Removal Microprocessor Fan15. System Board Components System Board ComponentsExpansion-Card Cage Expansion Cards17. Expansion-Card Removal Expansion Card18. Riser Board Removal Riser Board19. Dimm Removal DIMMs21. Microprocessor Securing Clip Microprocessor/Heat Sink Assembly22. Microprocessor Removal Terminator Card Terminator or Add-In Card24. Add-In Card Removal Add-In CardRemove the battery System BatteryRemove the system board as follows System BoardSystem Setup Program USB System Setup ScreensTable A-1. System Setup Categories Be shadowed or cached. If video problems Check the monitor documentation to make Table A-1. System Setup Categories Index Dskt connector, 1-12,4-16dual-processing,1-5 ECC DIMMs LINE-IN connector, 1-12,4-16 USB description Location, 1-4,1-12