Dell 100-Mbps O

Basic Troubleshooting 2-3

8. Inspect the exterior of the system unit, including all controls and indica-

tors, and all user-accessible data storage devices for any signs of

physical damage.

Does the inspection reveal any problems?

Yes . Proceed to the appropriate procedure in Chapter 4, “Removing and

Replacing Parts.”

No. Proceed to the next section, “Observing the Boot Routine.”

O

bserving the Boot Routine

After you have performed an external visual inspection as described in the pre-

vious section, you should boot the system and, while the boot routine is

running, observe the system for any indications of problems.

NOTE: Most of the steps in this procedure require observation of system func-

tions and indications, some of which can occur simultaneously. It may be

necessary to reboot the system several times in order to complete all of these

steps.

To observe problem indications during the boot routine, follow these steps:

1. Insert the diagnostics diskette into drive A. Turn on all peripherals and

the system unit. If the system unit is already on, press the reset button

or <Ctrl><Alt><Del> to reboot the system.

2. Check the power supply fan.

Does the fan run normally?

Yes . Proceed to step 3.

No. Troubleshoot the system power supply.

3. Watch the Num Lock, Caps Lock, and Scroll Lock indicators on the

upper-right corner of the keyboard. After all three indicators flash

momentarily, the Num Lock indicator should light up and remain on.

Do these indicators flash on and off within approximately ten seconds after

the boot routine starts?

Yes . Proceed to step 4.

No. Troubleshoot the system power supply. If the troubleshooting pro-

cedure indicates that the system power supply is operational, troubleshoot

the memory.

4. During the boot routine, observe the system unit for any of the

following:

•Diskette-drive and hard-disk drive access indicators: These indicators

light up in response to data being transferred to or from the drives. If

either of these indicators fails to light up during the boot routine, trouble-

shoot the diskette drive or hard-disk drive subsystem, as appropriate.

Contents

Main Page Contents Chapter 1 System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Chapter 2 Basic Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Chapter 3 Beep Codes and Error Messages . . . . . . . . . . . . . . . . . . 3-1 Chapter 4 Removing and Replacing Parts . . . . . . . . . . . . . . . . . . . 4-1 Appendix A System Setup Program . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 Index Figures Tables Page ead This First W arnings, Cautions, and Notes Chapter 1 System Overview ystem Features Figure 1-1. System Unit Orientation 1-4 Dell OptiPlex GX Systems Service Manual Figure 1-2. Front-Panel Features Figure 1-3. Internal View Dual-Processor Capability Advanced Expansion Subsystem Figure 1-4. Riser-Board Expansion-Card Connectors Hard-Disk Drive Options Enhanced Dual-Interface EIDE Subsystem Audio Controller PCI Video Card NIC USB Desktop Chassis Thermal Monitoring ystem Unit System Power Supply Pin Assignments for the DC Power Connectors Table 1-1. DC Voltage Ranges System Overview 1-9 Figure 1-5. DC Power Connector P1 Figure 1-6. DC Power Connectors P2, P3, P4, P5, and P6 P2, P3, P5, P6 1-10 Dell OptiPlex GX Systems Service Manual DC Power Distribution Figure 1-8. DC Power Cables Figures 1-8 and 1-9 provide the following information about DC power distribution: P7 Figure 1-9. Power Distribution System Overview 1-11 1-12 Dell OptiPlex GX Systems Service Manual System Board Layout The subsections that follow provide service-related information about the sys- tem board components. Figure 1-10. System Board Components Video Memory Main Memory Figure 1-11. System Board Jumpers System Board Jumpers nterrupt Assignments Table 1-2. Jumper Descriptions Table 1-3. Interrupt Assignments D MA Channel Assignments Table 1-4. DREQ Line Assignments Table 1-3. Interrupt Assignments (continued) echnical Specifications Table 1-5. Technical Specifications Page Page Page Page Chapter 2 Basic Troubleshooting nitial User Contact xternal Visual Inspection O bserving the Boot Routine nternal Visual Inspection liminating Resource Conflicts unning the Diskette-Based Diagnostics G etting Help Chapter 3 Beep Codes and Error Messages P OST Beep Codes Table 3-1. POST Beep Codes Table 3-1. POST Beep Codes (continued) ystem Error Messages Table 3-2. System Error Messages Page Page Page Page Page Page Chapter 4 Removing and Replacing Parts ecommended Tools P recautionary Measures F loor Stand Figure 4-1. Floor Stand Removal ystem Unit Cover Figure 4-2. System-Unit Cover Removal Figure 4-3. Padlock Removal ject, Power, and Reset Buttons Figure 4-4. Eject, Power, and Reset Button Removal F ront-Panel Inserts Figure 4-5. Front-Panel Insert Removal ndicator Card Figure 4-6. Indicator Card Removal peaker Figure 4-7. Speaker Removal Removing and Replacing Parts 4-9 D rives Figure 4-8. Drive Hardware Drives in the Drive Cage Figure 4-9. 3.5-Inch Diskette Drive Removal Page Hard-Disk Drives Figure 4-11. Hard-Disk Drive Bracket Removal Figure 4-12. Hard-Disk Drive Removal ystem Power Supply Figure 4-13. Power Supply Removal M icroprocessor Fan Figure 4-14. Microprocessor Fan Removal 4-16 Dell OptiPlex GX Systems Service Manual ystem Board Components The subsections that follow contain procedures for removing system board components. Figure 4-15. System Board Components Expansion Cards Expansion-Card Cage Figure 4-16. Expansion-Card Cage Removal Expansion Card Figure 4-17. Expansion-Card Removal Riser Board Figure 4-18. Riser Board Removal DIMMs Figure 4-19. DIMM Removal Figure 4-20. DIMM Installation Microprocessor/Heat Sink Assembly Figure 4-21. Microprocessor Securing Clip Figure 4-22. Microprocessor Removal Terminator or Add-In Card Terminator Card Figure 4-23. Terminator Card Removal Add-In Card Figure 4-24. Add-In Card Removal System Battery Figure 4-25. System Battery Removal ystem Board Figure 4-26. System Board Removal Appendix A System Setup Program A-2 Dell OptiPlex GX Systems Service Manual ystem Setup Screens XXXXX Figure A-1. System Setup Screens XXXXX Table A-1. System Setup Categories Page Page Page Index Numbers A B C E F H I J L M N P R T U V