Page 3 - Contents
v Contents Chapter 1System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Dual-Processor Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 5 - Index
vii Terminator Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 Add-In Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 System Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
Page 6 - Tables
viii Figure 4-16. Expansion-Card Cage Removal . . . . . . . . . . . . . . . . . . . . . . 4-17 Figure 4-17. Expansion-Card Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 Figure 4-18. Riser Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19 Figure 4-19....
Page 8 - ead This First; -compatible PCs and prior training in IBM-
R ead This First W arnings, Cautions, and Notes Throughout this manual, there may be blocks of text printed in bold type or in italic type. These blocks are warnings, cautions, and notes, and they are used as follows: NOTE: A NOTE provides helpful information about using the computer system. A prere...
Page 9 - Chapter 1; System Overview
System Overview 1-1 Chapter 1 System Overview T his service manual covers the Dell ® OptiPlex ® GXpro high-speed, upgrad- able desktop systems, which use the Intel ® Pentium ® Pro family of microprocessors. These Dell systems incorporate the high-performance PCI local bus as well as the ISA expansio...
Page 10 - ystem Features; Advanced combination ISA and PCI expansion subsystem.
1-2 Dell OptiPlex GX pro Systems Service Manual S ystem Features In addition to the standard features found in a traditional personal computer, the Dell OptiPlex GXpro desktop systems include the following new and/or advanced features: • Dual-processor capability. • Advanced combination ISA and PCI ...
Page 13 - Dual-Processor Capability; Windows NT; Advanced Expansion Subsystem
System Overview 1-5 Dual-Processor Capability With the installation of a microprocessor add-in card in the terminator card slot, the system unit becomes a dual-processing system. The add-in card’s micro-processor must have the same frequency and cache size as the system board’s microprocessor. In or...
Page 14 - Hard-Disk Drive Options; NOTE: Some users may use an ISA video adapter card.
1-6 Dell OptiPlex GX pro Systems Service Manual Hard-Disk Drive Options The hard-disk drive bracket is located next to the drive bays at the front of the system unit. The system unit can contain up to two, one-inch-high, hard-disk drives or one, 1.6-inch-high, half-height and one, one-inch-high, har...
Page 15 - NIC; The message; USB
System Overview 1-7 NIC GXpro systems contain either an integrated 10-Mbps or 10/100-Mbps 3Com NIC. GXpro systems containing the 10-Mbps Ethernet NIC have a built-in inte-grated 3Com 3C915 NIC chip. GXpro systems containing the 10/100-Mbps Ethernet NIC have a built-in integrated 3Com 3C916 Ethernet ...
Page 16 - SMART Support; ystem Unit; System Power Supply; Pin Assignments for the DC Power Connectors
1-8 Dell OptiPlex GX pro Systems Service Manual SMART Support The system has SMART-compliant hard-disk drives and SMART support in the system BIOS, which warns you at system start-up if a hard-disk drive has become unreliable. S ystem Unit The following subsections provide service-related informatio...
Page 18 - DC Power Distribution; Power-supply connector identification
1-10 Dell OptiPlex GX pro Systems Service Manual Figure 1-7. DC Power Connector P7 DC Power Distribution Figures 1-8 and 1-9 provide the following information about DC power distribution: • Power-supply connector identification • Power cable connections for diskette, tape, CD-ROM, and hard-disk driv...
Page 20 - System Board Layout; Video Memory
1-12 Dell OptiPlex GX pro 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 See the documentation from the video card manufacturer that came with your system...
Page 21 - Main Memory
System Overview 1-13 Main Memory The four DIMM sockets on the system board can accommodate combinations of 16-, 32-, 64-, and 128-MB DIMMs up to a total memory capacity of 512 MB. The system is shipped with high-speed (60-ns) EDO DIMMs that provide ECC functionality when used with the Intel 82440FX ...
Page 22 - nterrupt Assignments; PSWD; Generated by system timer.
1-14 Dell OptiPlex GX pro Systems Service Manual I nterrupt Assignments Table 1-2. Jumper Descriptions Jumper Description Default Setting PSWD Password enable/disable. Jumper installed, activates password feature. Installed (password feature enabled) BIOS Used for internal Dell debug tool. Not insta...
Page 23 - MA Channel Assignments
System Overview 1-15 D MA Channel Assignments IRQ8 Generated by keyboard controller for each tick of RTC. IRQ9 Available for use by expansion card. IRQ10 Available for use by expansion card. IRQ11 Available for use by expansion card. IRQ12 Generated by keyboard controller to indicate that mouse’s ou...
Page 24 - echnical Specifications; ings with the two ISA connectors)
1-16 Dell OptiPlex GX pro Systems Service Manual T echnical Specifications Table 1-5. Technical Specifications Microprocessor Microprocessor type . . . . . . . . Intel Pentium Pro microprocessor Microprocessor speed . . . . . . . 200 or 180 MHz First-level cache . . . . . . . . . . . 16 KB Second-le...
Page 25 - Externally accessible:
System Overview 1-17 System Clocks System clock . . . . . . . . . . . . . . 60 or 66 MHz (matches external processor speed) Diskette/communications ports . . . . . . . . . . . . . . . . . . . . 24 MHz from the system clock Memory Architecture . . . . . . . . . . . . . . 64-bit, noninterleaved DIMM s...
Page 26 - Internally accessible:; keyboard
1-18 Dell OptiPlex GX pro Systems Service Manual Ports (continued) Internally accessible: EIDE hard-disk drive . . . . two 40-pin connectors on PCI local bus Diskette drive . . . . . . . . . . 34-pin connector Video Video type. . . . . . . . . . . . . . . . PCI video card (see manufacturer’s specifi...
Page 27 - installed
System Overview 1-19 z Physical Height . . . . . . . . . . . . . . . . . . . 16.5 cm (6.5 inches) Width. . . . . . . . . . . . . . . . . . . . 41.9 cm (16.5 inches) Depth . . . . . . . . . . . . . . . . . . . . 44.5 cm (17.5 inches) Environmental Weight . . . . . . . . . . . . . . . . . . 12.7 kg (2...
Page 29 - Chapter 2; Basic Troubleshooting; nitial User Contact; he or she was performing at the time the problem occurred.; Can the user duplicate the problem?
Basic Troubleshooting 2-1 Chapter 2 Basic Troubleshooting T his chapter describes basic troubleshooting procedures that can help you diagnose a computer system problem. These procedures can often reveal the source of a problem or indicate the correct starting point for troubleshooting the system. A ...
Page 30 - xternal Visual Inspection
2-2 Dell OptiPlex GX pro Systems Service Manual E xternal Visual Inspection The external visual inspection consists of a quick inspection of the exterior of the system unit, the monitor, the keyboard, any peripherals, and cables. While performing the visual inspection, make any necessary corrections...
Page 31 - Does the inspection reveal any problems?; bserving the Boot Routine; Does the fan run normally?; Watch the Num Lock, Caps Lock, and Scroll Lock indicators on the
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...
Page 32 - normal and is not a beep code.; Observe the monitor screen for the Diagnostics Menu.; and reboot the system.; Does the Diagnostics Menu appear?; nternal Visual Inspection; To perform the internal visual inspection, follow these steps:; all the AC power cables from their power sources.
2-4 Dell OptiPlex GX pro Systems Service Manual • System error messages: These messages can indicate problems or pro-vide status information. If a system error message is displayed, see Table 3-2. • Beep codes: A beep code is a series of beeps that indicates an error con-dition. If the system emits ...
Page 33 - If you need to reseat an expansion card, use a; Verify that all jumpers are set correctly.; Does the problem appear to be resolved?; liminating Resource Conflicts
Basic Troubleshooting 2-5 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 c...
Page 34 - Run All Tests — Runs all tests for a thorough test of the system; etting Help
2-6 Dell OptiPlex GX pro Systems Service Manual To start the diagnostics, turn off the system unit, insert a diagnostics diskette into drive A, and then turn on the system unit. Starting the diagnostics causes the Dell logo screen to appear on the monitor screen, followed by a message indicating tha...
Page 35 - Chapter 3; Beep Codes and Error Messages; OST Beep Codes
Beep Codes and Error Messages 3-1 Chapter 3 Beep Codes and Error Messages T his chapter describes beep codes and system error messages that can occur during system start-up or, in the case of some failures, during normal system operation. The tables in this chapter list faults that can cause a beep ...
Page 37 - ystem Error Messages; Timer-chip counter 2 failure
Beep Codes and Error Messages 3-3 S ystem Error Messages Table 3-2 lists (in alphabetical order) system error messages that can appear on the monitor screen. These messages can help you find the source of a problem. Some of these error messages indicate fatal errors. When a fatal error occurs, the s...
Page 38 - Data error
3-4 Dell OptiPlex GX pro Systems Service Manual Table 3-2. System Error Messages Message Definition Probable Causes Address mark not found Attachment failed to respond BIOS found faulty disk sector or could not find particular disk sector. Diskette drive or hard-disk drive controller cannot send dat...
Page 42 - Defective system board.
3-8 Dell OptiPlex GX pro Systems Service Manual No boot device avail-able System does not recog-nize diskette drive or hard-disk drive from which it is trying to boot. Faulty diskette, diskette/tape drive subsystem, hard-disk drive, hard-disk drive subsystem, or no boot disk in drive A. No boot sec-...
Page 43 - Seek error
Beep Codes and Error Messages 3-9 Sector not found MS-DOS unable to locate sector on diskette or hard-disk drive. Defective sectors on dis-kette or hard-disk drive. Seek error MS-DOS unable to locate specific track on diskette or hard-disk drive. Defective diskette or hard-disk drive. Seek opera-tio...
Page 44 - Write fault
3-10 Dell OptiPlex GX pro Systems Service Manual Warning-Temperature is too high At system start-up, BIOS detected that one or both micro-processors have overheated. One or both micro-processors are too hot. Write fault Write fault on selected drive MS-DOS cannot write to diskette or hard-disk drive...
Page 45 - Chapter 4; Removing and Replacing Parts; You have removed the system unit cover.; ecommended Tools; Small flat-blade screwdriver
Removing and Replacing Parts 4-1 Chapter 4 Removing and Replacing Parts T his chapter provides procedures for removing the components, assemblies, and subassemblies in the system unit. Unless otherwise noted, each procedure assumes the following: • You have performed the steps in “Precautionary Meas...
Page 46 - recautionary Measures; WARNING FOR YOUR PERSONAL SAFETY
4-2 Dell OptiPlex GX pro Systems Service Manual P recautionary Measures Before you perform any of the procedures in this chapter, take a few moments to read the following warning for your personal safety and to prevent damage to the computer system from ESD. WARNING FOR YOUR PERSONAL SAFETY AND PROT...
Page 47 - loor Stand; To remove the floor stand, follow these steps:; Place left side of the system unit on a flat work surface.
Removing and Replacing Parts 4-3 F loor Stand Figure 4-1. Floor Stand Removal To remove the floor stand, follow these steps: 1. Place left side of the system unit on a flat work surface. 2. Unscrew the floor stand screw. Use your fingers or a wide flat-blade screwdriver to unscrew the floor stand sc...
Page 48 - ystem Unit Cover; To remove the system unit cover, follow these steps:; Remove the padlock if one is installed.
4-4 Dell OptiPlex GX pro Systems Service Manual S ystem Unit Cover Figure 4-2. System-Unit Cover Removal To remove the system unit cover, follow these steps: 1. Remove the padlock if one is installed. Figure 4-3. Padlock Removal 2. Press in the two securing buttons until the cover is free to swing u...
Page 49 - back of the cover facing you.
Removing and Replacing Parts 4-5 E ject, Power, and Reset Buttons Figure 4-4. Eject, Power, and Reset Button Removal To remove the eject, power, and reset buttons, follow these steps: 1. Lay the system unit cover upside down on a flat work surface, with the back of the cover facing you. 2. To remove...
Page 50 - -inch nutdriver to help
4-6 Dell OptiPlex GX pro Systems Service Manual F ront-Panel Inserts Figure 4-5. Front-Panel Insert Removal To remove a front-panel insert, follow these steps: 1. Lay the system unit cover upside down on a flat work surface, with the back of the cover facing you. 2. For a 5.25-inch bay, pull the ins...
Page 51 - ndicator Card; To remove the indicator card, follow these steps:; Remove the speaker connector from the indicator card.
Removing and Replacing Parts 4-7 I ndicator Card Figure 4-6. Indicator Card Removal To remove the indicator card, follow these steps: 1. Remove the hard-disk drive bracket. See “Drives” found later in this chapter. 2. Remove the speaker connector from the indicator card. 3. Disconnect the indicator ...
Page 52 - peaker; To remove the speaker, follow these steps:
4-8 Dell OptiPlex GX pro Systems Service Manual S peaker Figure 4-7. Speaker Removal To remove the speaker, follow these steps: 1. Remove the hard-disk drive bracket. See “Drives” found later in this chapter. 2. Remove the speaker connector from the indicator card. 3. Lift the speaker out of the ret...
Page 53 - rives
Removing and Replacing Parts 4-9 D rives Figure 4-8 shows an example of drive hardware that can be installed in the sys-tem unit. Refer to this figure when you perform any of the procedures in the following subsections. Figure 4-8. Drive Hardware diskette/tape driveinterface cable DC power cable DSK...
Page 54 - Drives in the Drive Cage; Release the bracket catch from the chassis.
4-10 Dell OptiPlex GX pro Systems Service Manual Drives in the Drive Cage Figure 4-9. 3.5-Inch Diskette Drive Removal To remove a drive from the 3.5-inch diskette drive bay, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of the drive. 2. Remove the bracket...
Page 55 - the drive forward, and remove it from the drive bay.
Removing and Replacing Parts 4-11 Figure 4-10. 5.25-Inch Drive Removal To remove a 5.25-inch drive from the middle or lower drive bay, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of the drive. 2. Press out on the two retaining tabs on the sides of the d...
Page 56 - Remove the screw that secures the hard-disk drive bracket to the
4-12 Dell OptiPlex GX pro Systems Service Manual Hard-Disk Drives Figure 4-11. Hard-Disk Drive Bracket Removal To remove a hard-disk drive bracket, follow these steps: 1. Disconnect the DC power cable(s) and the interface cable(s) from the back of the drive(s). 2. Remove the screw that secures the h...
Page 57 - See the preceding procedure.
Removing and Replacing Parts 4-13 Figure 4-12. Hard-Disk Drive Removal To remove a hard-disk drive, follow these steps: 1. Remove the hard-disk drive bracket from the system unit. See the preceding procedure. 2. Remove the four screws that secure the hard-disk drive(s) to the bracket. 3. Slide the d...
Page 58 - ystem Power Supply; To remove the system power supply, follow these steps:
4-14 Dell OptiPlex GX pro Systems Service Manual S ystem Power Supply Figure 4-13. Power Supply Removal To remove the system power supply, follow these steps: 1. Disconnect the AC power cable from the back of the power supply. 2. Disconnect the DC power cables from the system board, drives, and expa...
Page 59 - icroprocessor Fan; Figure 4-14. Microprocessor Fan Removal; Sqeeze the latch and pull out the fan power cable from the micro-; Pull the fan forward and out of the system unit.
Removing and Replacing Parts 4-15 M icroprocessor Fan Figure 4-14. Microprocessor Fan Removal To remove the system power supply, follow these steps: 1. Rotate the power supply to the right to access the microprocessor fan connector. See “System Power Supply,” found earlier in this chapter. 2. Sqeeze...
Page 60 - ystem Board Components
4-16 Dell OptiPlex GX pro Systems Service Manual S ystem Board Components The subsections that follow contain procedures for removing system board components. Figure 4-15. System Board Components serial port 1/parallelport connectors (stacked) (PARALLEL/SERIAL) diskette/tape drive interface connecto...
Page 61 - Expansion Cards; Lift the expansion-card cage up and away from the system unit.
Removing and Replacing Parts 4-17 Expansion Cards The system unit has a removable expansion-card cage. The expansion cards fit into connectors on a riser board. Dell recommends that you remove the expansion-card cage first before removing or installing expansion cards. Expansion-Card Cage Figure 4-1...
Page 62 - Expansion Card; To remove an expansion card, follow these steps:; Remove the retaining screw from the card-mounting bracket.
4-18 Dell OptiPlex GX pro Systems Service Manual Expansion Card Figure 4-17. Expansion-Card Removal To remove an expansion card, follow these steps: 1. Remove the expansion-card cage. See the preceding procedure. 2. Remove the retaining screw from the card-mounting bracket. 3. Grasp the expansion ca...
Page 63 - Riser Board; To remove the riser board, follow these steps:; riser board facing you.
Removing and Replacing Parts 4-19 Riser Board Figure 4-18. Riser Board Removal To remove the riser board, follow these steps: 1. Remove the expansion-card cage and all expansion cards. See the preceding two procedures. 2. On a flat work surface, turn the expansion-card cage over, with the riser boar...
Page 64 - DIMMs
4-20 Dell OptiPlex GX pro Systems Service Manual DIMMs Figure 4-19. DIMM Removal To remove a DIMM, push outward on the DIMM socket’s securing clips until the DIMM is released from its socket. Then lift the DIMM away from the socket. Figure 4-20. DIMM Installation To replace a DIMM, press outward on ...
Page 65 - Microprocessor/Heat Sink Assembly; Figure 4-21. Microprocessor Securing Clip
Removing and Replacing Parts 4-21 Microprocessor/Heat Sink Assembly Figure 4-21. Microprocessor Securing Clip To remove the microprocessor/heat sink assembly, follow these steps: 1. Remove the microprocessor securing clip from the microprocessor/heat sink assembly. Press down on the folded part of t...
Page 67 - Terminator or Add-In Card; Terminator Card; To remove a terminator card, follow these steps:; Grasp the small white “handle” installed on the top of the card.
Removing and Replacing Parts 4-23 Terminator or Add-In Card The system unit may have a terminator card or a secondary microprocessor (dual-processing systems) on an add-in card installed on the system board. This section describes removing and replacing the terminator card and the add-in card. Termi...
Page 68 - Gently grip the card’s metal mounting bracket with both hands.
4-24 Dell OptiPlex GX pro Systems Service Manual Add-In Card Figure 4-24. Add-In Card Removal To remove an add-in card, follow these steps: 1. Gently grip the card’s metal mounting bracket with both hands. 2. Pull up until the card is freed from the connector. To reinstall the card, with the metal m...
Page 69 - System Battery; To remove the system battery, follow these steps:; of the System Setup screens.; See “System Power Supply” found earlier in this chapter.; socket and snap it into place.; Rotate the power supply back into position.
Removing and Replacing Parts 4-25 System Battery Figure 4-25. System Battery Removal To remove the system battery, follow these steps: 1. If possible, enter the System Setup program, and make a printed copy of the System Setup screens. 2. Rotate the power supply out of the way. See “System Power Sup...
Page 70 - ystem Board; To remove the system board, follow these steps:; Disconnect all cables from their connectors at the back of the; c. Lift the system board out of the system unit.
4-26 Dell OptiPlex GX pro Systems Service Manual S ystem Board Figure 4-26. System Board Removal To remove the system board, follow these steps: 1. Disconnect all cables from their connectors at the back of the system unit. 2. Remove the expansion-card cage. 3. Remove the microprocessor fan. 4. Disc...
Page 71 - Appendix A; System Setup Program; To enter the System Setup program, follow these steps:; message; Press
System Setup Program A-1 Appendix A System Setup Program T his appendix describes the System Setup program, which is used to change the system configuration information stored in NVRAM on the system board. To enter the System Setup program, follow these steps: 1. Turn on (or reboot) the system. 2. P...
Page 72 - ystem Setup Screens
A-2 Dell OptiPlex GX pro Systems Service Manual S ystem Setup Screens Figure A-1. System Setup Screens Drives: Primary Type Cyls Hds Pre LZ Sec Size Drive 0: Auto 524 32 -1 524 63 540 Drive 1: None Microprocessor: Pentium Pro-200 Level 2 Cache: 512 KB Integrated System Memory: 64 MB ECC EDO Service ...
Page 73 - Category
System Setup Program A-3 Table A-1. System Setup Categories Category Function Time Resets time on system’s internal clock. Date Resets date on system’s internal calendar. Diskette Drive A Diskette Drive B Identifies type of diskette drives installed. Cat-egory options always match physical locations...
Page 77 - Numbers
Index 1 Index Numbers 3.3-V power input connectors , 1-12, 4-16 A AC power receptacle , 1-4 add-in card, removal , 4-24 audio controller , 1-6 B battery illustrated , 4-25 removing and replacing , 4-25 socket , 1-12, 4-16 beep codes , 3-1 BIOS chip , 1-12, 4-16 boot routine, observing when trouble- ...
