Dell 100-Mbps - page 74

A-4 Dell OptiPlex GX

pro

Systems Service Manual

Reserved Memory Designates a region of system board memory

that can be supplied by an expansion card.

This feature should not be enabled unless an

expansion card that requires special addressing

is installed.

Fast Video BIOS Enables shadowing and caching the BIOS for a

video card installed in an expansion slot.

NOTE: Some video cards are not designed to

be shadowed or cached. If video problems

occur, try setting Fast Video BIOS to Off.

CPU Speed Indicates processor speed at which system

boots—the processor’s rated speed or a slower

compatibility speed.

Num Lock Determines whether keyboard’s Num Lock

mode is activated.

Keyboard Errors Enables or disables reporting of keyboard

errors during POST.

System Password Displays current status of system’s password

security feature. Also used to assign and verify

a new password.

Password Status Provides an extra measure of system security

by letting you set the system password to

Locked or Unlocked.

Boot Sequence Determines whether system boots from dis-

kette (if present) or hard-disk drive.

Setup Password Restricts access to System Set up progra m.

Table A-1. System Setup Categories (continued)

Category Function

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