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Page 4 International Business Machines Corporation; 3Com is a registered trademark of 3Com Corporation. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its own.
Page 5: Table Of Contents
Contents Chapter 1 System Overview....... 1-1 System Features ..........1-2 Advanced Expansion Subsystem .
Page 6 Chapter 2 Basic Troubleshooting ......2-1 Initial User Contact ..........2-1 External Visual Inspection .
Page 7 Microprocessor/Heat Sink Assembly ......4-19 System Battery ..........4-21 System Board .
Page 8 Eject, Power, and Reset Buttons ........6-5 Front-Panel Inserts .
Page 9 Figure 1-12. DC Power Connectors P2 (Midsize and Mini Tower), P3, P4, P5, P6, and P9 ......1-14 Figure 1-13.
Page 10 Figure 5-8. 5.25-Inch Drive Assembly Removal ....5-10 Figure 5-9. 5.25-Inch Drive Removal ......5-10 Figure 5-10.
Page 11 Figure 6-22. NIC Daughter-Board Removal ..... . . 6-22 Figure 6-23. Microprocessor Securing-Clip Removal ....6-23 Figure 6-24.
Page 12 -compatible PCs and prior training in IBM- compatible PC troubleshooting techniques. In addition to information provided in this manual and the User’s Guide that came with the system, Dell provides the Diagnostics and Troubleshooting Guide for troubleshooting pro- cedures and instructions on using the Dell diagnostics to test the computer system.
Page 13: Figure 1-12. Dc Power Connectors P2 (Midsize And Mini Tower), P3, P4, P5
Figure 4-15. DIMM Installation ....... . . 4-16 DELL CONFIDENTIAL...
Page 14 Drive Hardware ........6-9 Figure 6-8. 3.5-Inch Drive Assembly Removal ....6-10 DELL CONFIDENTIAL Preliminary 6/16/97...
Page 15 Figure 6-26. System Board Removal ......6-26 Figure A-1. System Setup Screens .......A-2 DELL CONFIDENTIAL Preliminary...
Page 16 DELL CONFIDENTIAL Preliminary 6/16/97...
Page 17 System Error Messages ......3-5 Table A-1. System Setup Categories ......A-3 DELL CONFIDENTIAL Preliminary 6/16/97...
Page 18 DELL CONFIDENTIAL Preliminary 6/16/97 xviii...
Page 19: Chapter 1 System Overview
Chapters 1 through 3 and Appendix A contain information that applies to all models of the Dell OptiPlex GXi systems. Chapters 4, 5, and 6 are chassis- specific. ®...
Page 20: System Features
Features In addition to the standard features found in a traditional personal computer, the Dell OptiPlex GXi systems include the following new and/or advanced features: • Advanced combination ISA and PCI expansion subsystem • Plug and Play ISA expansion-card capability •...
Page 21: Figure 1-1. Computer Orientation
back back right side left right side left side side front front Low-Profile Computer Midsize Computer back front bottom Mini Tower Computer Figure 1-1. Computer Orientation System Overview...
Page 22: Figure 1-2. Front-Panel Features
Midsize Computer diskette-drive access indicator power indicator power button hard-disk drive reset button access indicator Mini Tower Computer Figure 1-2. Front-Panel Features Dell OptiPlex GXi Systems Service Manual...
Page 23: Figure 1-3. Internal View Of The Low-Profile Computer
CAUTION: To avoid possible data or file structure corruptions, the front-panel reset button should be used only when the computer cannot be rebooted by pressing Ctrl . Before you use the reset < >< >< > button to initiate a hardware reset, close any open application programs and files if possible.
Page 24: Figure 1-4. Internal View Of The Midsize Computer
(5) keyboard connector USB connectors (2) audio connectors (3) NIC connector video connector Figure 1-4. Internal View of the Midsize Computer Dell OptiPlex GXi Systems Service Manual...
Page 25: Advanced Expansion Subsystem
Figure 1-5. Internal View of the Mini Tower Computer Advanced Expansion Subsystem The Dell OptiPlex GXi systems offer advanced expansion subsystems that can support a mixture of traditional ISA expansion cards (called legacy cards), Plug and Play ISA expansion cards, and PCI expansion cards. The ISA Configuration Utility (ICU) included with the computer provides a means of avoiding resource conflicts that might arise from such an arrangement.
Page 26: Midsize Computer's Expansion-Card Slots
(see Figure 1-8). ISA3 connector ISA2 connector ISA1 HDLED connector connector PCI3 connector PCI2 connector PCI1 connector Figure 1-7. Riser Board for the Midsize Computers (Option 1) Dell OptiPlex GXi Systems Service Manual...
Page 27: Mini Tower Computer's Expansion-Card Slots
ISA2 PCI5 connector connector PCI4 ISA1 connector connector HDLED connector PCI2 PCI3 connector connector PCI1 connector Figure 1-8. Riser Board for the Midsize Computers (Option 2) Mini Tower Computer’s Expansion-Card Slots The mini tower computers have seven expansion-card slots. The riser board has four ISA expansion-card connectors and five PCI expansion-card connectors.
Page 28: Hard-Disk Drive Options
The video subsystem consists of a high-speed, high-resolution video controller built into the system board. Because the video controller connects to the PCI bus rather than to the ISA bus, communication between the video subsystem and the Dell OptiPlex GXi Systems Service Manual 1-10...
Page 29: Built-In Audio Controller
Built-In NIC ® The Dell OptiPlex GXi systems have an integrated 10/100-Mbps 3Com 3C905 Ethernet NIC subsystem. The system contains either a 100BASE-TX or 100BASE-T4 NIC daughter board, depending on network cabling require- ments.
Page 30: Floor Stand
Chapter 4, “Using Integrated Devices,” in the Reference and Installation Guide provides instructions for connecting the mini tower computer to, and configur- ing it for, use on an Ethernet network. A Dell OptiPlex GXi Systems Documentation Update provides instructions for low-profile and midsize computers.
Page 31: Table 1-1. Dc Voltage Ranges
Table 1-1. DC Voltage Ranges Voltage Range Maximum Output Current +3.3 VDC +3.15 to +3.45 VDC 12.0 A (low-profile computers) 14.0 A (midsize and mini tower computers) +5 VDC +4.75 to +5.25 VDC 18.0 A (low-profile computers) 22.0 A (midsize and mini tower computers) +12 VDC +11.40 to +12.60 VDC...
Page 32: Pin Assignments For The Dc Power Connectors
+5 VDC (red) common (black) common (black) common (black) common (black) +5 VDC (red) +12 VDC (yellow) Figure 1-12. DC Power Connectors P2 (Midsize and Mini Tower), P3, P4, P5, P6, and P9 Dell OptiPlex GXi Systems Service Manual 1-14...
Page 33: Dc Power Distribution
P2, P7 +3.3 VDC (blue/white) +3.3 VDC (blue/white) +3.3 VDC (blue/white) common (black) common (black) common (black) Figure 1-13. DC Power Connectors P2 (Low-Profile) and P7 DC Power Distribution Figures 1-14 through 1-19 provide the following information about DC power distribution: •...
Page 34: Figure 1-15. Dc Power Distribution For The Low-Profile Computers
DIMM_C KYBD 3.5-inch DIMM_D +5 VDC diskette drive MOUSE processor internal MICROPROCESSOR core regulator hard-disk drive +3.3 VDC core VCC +2.1 to +3.5 VDC Figure 1-15. DC Power Distribution for the Low-Profile Computers Dell OptiPlex GXi Systems Service Manual 1-16...
Page 35: Figure 1-16. Dc Power Cables For The Midsize And Mini Tower Computers
* Connector P6 was not present in earlier midsize computers; in these computers, connector P9 was labeled “P6.” Figure 1-16. DC Power Cables for the Midsize and Mini Tower Computers System Overview 1-17...
Page 36: Figure 1-17. Dc Power Distribution For The Midsize Computers
A second riser board option provides two additional PCI connectors (PCI4 and PCI5) and only two ISA connectors (ISA1 and ISA2). Some computers have an additional connector (P9) that may be used instead of P5 or P6. Figure 1-17. DC Power Distribution for the Midsize Computers Dell OptiPlex GXi Systems Service Manual 1-18...
Page 37: Figure 1-18. Dc Power Distribution For The Mini Tower Computers
system board keyboard controller +3 VDC riser board battery power management RTC/ +3.3 VDC NVRAM logic PCI1 +5 VDC POWER1 through +12 VDC PWRGOOD PCI5 –12 VDC RISER PSON# PSON# +5 VFP +5 VFP system +5 VDC +5 VDC +5 VDC ISA1 +5 VDC power supply...
Page 38: System Board
3.3-V power input connector (POWER2) diskette/tape drive interface connector front of computer primary EIDE (DSKT) connector (IDE1) CD-ROM interface secondary EIDE connector control panel connector (CD_IN) (IDE2) connector (PANEL) Figure 1-19. System Board Components Dell OptiPlex GXi Systems Service Manual 1-20...
Page 39: Main Memory
Main Memory The four DIMM sockets on the system board can accommodate combinations of 8-, 16-, 32-, 64-, and 128-MB DIMMs up to a total memory capacity of 512 MB. Main memory can have either 72-bit parity (ECC) DIMMs or 64-bit nonparity DIMMs.
Page 40: Table 1-2. System-Board Jumper Descriptions
Service procedure only — Install jumper, disable then boot the computer to clear the NIC set- tings and reset the base address to 200h; then remove the jumper to allow configura- tion changes. * Not on all systems Dell OptiPlex GXi Systems Service Manual 1-22...
Page 41: Interrupt Assignments
nterrupt Assignments Table 1-3. Interrupt Assignments IRQ Line Used By/Available IRQ0 Generated by system timer. IRQ1 Generated by keyboard controller to indicate that keyboard’s out- put buffer is full. IRQ2 Generated internally by interrupt controller to enable IRQ8 through IRQ15. IRQ3 Available for use by an expansion card.
Page 42: Dma Channel Assignments
Generated by bus controller chip to activate second DMA controller DREQ5 Available DREQ6 Available DREQ7 Available NOTE: The built-in sound controller, built-in NIC, and built-in video controllers are assigned available DMA channels automatically during system start-up. Dell OptiPlex GXi Systems Service Manual 1-24...
Page 43: Technical Specifications
echnical Specifications Table 1-5. Technical Specifications Microprocessor Microprocessor type ..Intel Pentium microprocessor or Intel Pen- tium microprocessor with MMX technology Microprocessor speed ..133, 166, or 200 MHz for standard micro- processors 166, 200, or 233 MHz for microprocessors with MMX technology...
Page 44 CD-ROM drives Mini tower computers ..one 3.5-inch bay, dedicated to a 3.5-inch diskette drive; three 5.25-inch bays for dis- kette drives, tape drives, or CD-ROM drives Dell OptiPlex GXi Systems Service Manual 1-26...
Page 45 Table 1-5. Technical Specifications (continued) Drives (continued) Internal hard-disk drive bays: Low-profile computers . . . one bay for a 1-inch-high EIDE or SCSI hard-disk drive Midsize computers ..two bays for either one or two 1-inch-high EIDE or SCSI hard-disk drives, or one 1-inch-high EIDE or SCSI hard-disk drive and one 1.6-inch-high EIDE or SCSI hard-...
Page 46 (on NIC connector)..yellow LED Power Power supply wattage: Low-profile computers . . . 145 W Midsize computers ..200 W Mini tower computers ..200 W Dell OptiPlex GXi Systems Service Manual 1-28...
Page 47 Table 1-5. Technical Specifications (continued) Power (continued) Power-supply heat dissipation: Low-profile computers . . . 808 BTUs (nominal) Midsize computers ..913 BTUs (nominal) Mini tower computers . . . 913 BTUs (nominal) Power supply voltage ..90 to 135 V at 60 Hz;...
Page 48 –16 to 10,600 m (–50 to 35,000 ft) The maximum operating temperature of 35°C (95°F) is for altitudes below 914.6 m (3000 ft). Above 914.6 m (3000 ft) the maximum operating temperature is reduced. Dell OptiPlex GXi Systems Service Manual 1-30...
Page 49: Basic Troubleshooting
A brief explanation of how to load and start the diskette-based diagnostics is located at the end of the chapter. Dell recommends that you perform the follow- ing procedures in the order they are presented in this manual.
Page 50: External Visual Inspection
For proper settings of the video monitor controls, see the documentation for the monitor. 7. Inspect the keyboard to ensure that no keys are sticking. If one or more keys are sticking, it may be necessary to replace the keyboard. Dell OptiPlex GXi Systems Service Manual...
Page 51: Observing The Boot Routine
8. Inspect the exterior of the computer, 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. Refer to the procedure in Chapter 4, “Removing and Replacing Parts on the Low-Profile Chassis,”...
Page 52: Internal Visual Inspection
To perform the internal visual inspection, follow these steps: 1. Turn off the system, including any attached peripherals, and disconnect all the AC power cables from their power sources. 2. Remove the computer cover. Dell OptiPlex GXi Systems Service Manual...
Page 53 3. Verify that all chips, DIMMs, and expansion cards are fully seated in their sockets or connectors. WARNING: The microprocessor can get extremely hot. Be sure the chip has had sufficient time to cool before you touch it. While reseating the microprocessor, use a wrist grounding strap or maintain contact with a metal surface on the chassis.
Page 54: Eliminating Resource Conflicts
To start the diagnostics, turn off the system, insert a diagnostics diskette into drive A, and then turn on the system. Starting the diagnostics causes the Dell logo screen to appear on the monitor screen, followed by a message indicating that the diagnostics is loading. Before the diagnostics loads, a program tests the portion of main memory (RAM) required for loading the diagnostics.
Page 55: Beep Codes And Error Messages
Chapter 3 Beep Codes and Error Messages his chapter describes beep codes and system error messages that can occur during the POST or, in the case of some failures, during normal system opera- tion. The tables in this chapter list faults that can cause a beep code or system error message to occur and the probable causes of the fault in each case.
Page 56: Table 3-1. Post Beep Codes
2-4-4 3-1-1 Slave DMA-register failure Defective system board 3-1-2 Master DMA-register failure 3-1-3 Master interrupt-mask regis- ter failure 3-1-4 Slave interrupt-mask register failure 3-2-4 Keyboard-controller test Faulty keyboard controller failure (defective system board) Dell OptiPlex GXi Systems Service Manual...
Page 57 Table 3-1. POST Beep Codes (continued) Beep Code Error Probable Causes 3-3-4 Screen initialization failure Faulty video subsystem (defective system board) 3-4-1 Screen-retrace test failure 3-4-2 Search for video ROM failure 4-2-1 No timer tick Defective system board 4-2-2 Shutdown failure 4-2-3 Gate A20 failure 4-2-4...
Page 58: System Error Messages
• Keyboard controller failure • Keyboard data line failure • Keyboard stuck key failure • No timer tick interrupt • Shutdown failure • Timer chip counter 2 failed • Unexpected interrupt in protected mode Dell OptiPlex GXi Systems Service Manual...
Page 59: Table 3-2. System Error Messages
Table 3-2. System Error Messages Message Definition Probable Causes BIOS found faulty disk Faulty diskette/tape drive Address mark sector or could not find subsystem or hard-disk not found particular disk sector. drive subsystem (defec- tive system board). Diskette drive or hard- Faulty interface cable or Attachment disk drive controller...
Page 60 Keyboard fail- ler (defective system board). Keyboard/mouse con- Defective keyboard/ Keyboard troller failed. mouse controller (defec- controller tive system board). failure Dell OptiPlex GXi Systems Service Manual...
Page 61 Table 3-2. System Error Messages (continued) Message Definition Probable Causes System cannot commu- Keyboard cable connec- Keyboard data nicate with keyboard. tor loose or improperly line failure connected, defective keyboard, or defective Keyboard keyboard/mouse control- stuck key ler (defective system failure board).
Page 62 Reset failed failed. diskette/tape drive, hard- disk drive interface cable, or power cable. MS-DOS unable to Defective sectors on dis- Sector not locate sector on diskette kette or hard-disk drive. found or hard-disk drive. Dell OptiPlex GXi Systems Service Manual...
Page 63 Table 3-2. System Error Messages (continued) Message Definition Probable Causes MS-DOS unable to Defective diskette or Seek error locate specific track on hard-disk drive. diskette or hard-disk drive. System could not find Faulty diskette or hard- Seek opera- particular address mark disk drive.
Page 64 Dell OptiPlex GXi Systems Service Manual 3-10...
Page 65: Removing And Replacing Parts On The Low-Profile Chassis
Dell OptiPlex GXi low-profile computer. If you are servicing a Dell OptiPlex GXi midsize or mini tower computer, use Chapter 5, “Removing and Replacing Parts on the Midsize Chassis,” or Chapter 6, “Removing and Replacing Parts on the Mini Tower Chassis.”...
Page 66: Precautionary Measures
If a wrist grounding strap is not available, touch an unpainted metal surface on the back of the computer to discharge any static charge from your body. Dell OptiPlex GXi Systems Service Manual...
Page 67: Computer Cover
omputer Cover securing buttons (2) front of computer Figure 4-1. Computer Cover Removal To remove the computer cover, follow these steps: 1. Remove the padlock if one is installed. 2. Press in on the two securing buttons until the cover is free to swing up. 3.
Page 68: Eject, Power, And Reset Buttons
When these clips are released, the button comes free from the front panel of the cover. Dell OptiPlex GXi Systems Service Manual...
Page 69: Front-Panel Inserts
ront-Panel Inserts 5.25-inch front- panel insert computer cover (upside down) posts (2) ring-tabs (2) Figure 4-3. Front-Panel Insert Removal To remove a front-panel insert, follow these steps: 1. Lay the computer cover upside down on a flat work surface, with the front of the cover facing you.
Page 70: Control Panel
3. Remove the control panel from the chassis. When you reinstall the control panel, be sure to put the right side of the con- trol panel behind the mounting tab. Dell OptiPlex GXi Systems Service Manual...
Page 71: Drives
rives Figure 4-5 shows an example of drive hardware that can be installed in the com- puter. Refer to this figure when you perform any of the procedures in the following subsections. DC power cable 3.5-inch diskette diskette/tape drive drive interface cable system 5.25-inch drive...
Page 72: 3.5-Inch Diskette Drive Assembly
3. Remove the two drive-mounting screws from the left side of the drive, and remove the drive from the bracket. When you replace the 3.5-inch diskette drive, be sure the mounting holes on the right side of the drive engage the two hooks on the bracket. Dell OptiPlex GXi Systems Service Manual...
Page 73: 5.25-Inch Drive Assembly
5.25-Inch Drive Assembly front of computer drive-mounting screws (4) Figure 4-7. 5.25-Inch Drive Assembly Removal To remove a 5.25-inch drive assembly, follow these steps: 1. Remove the 3.5-inch diskette drive assembly. 2. Disconnect the DC power cable and the interface cable from the back of the 5.25-inch drive.
Page 74: Hard-Disk Drive Assembly
When you reinstall the hard-disk drive assembly, be sure the tabs on the back of the mounting plate fully engage in the notches on the chassis before you rotate the assembly into place. Dell OptiPlex GXi Systems Service Manual 4-10...
Page 75: System Power Supply
ystem Power Supply power supply power-supply mounting screw Figure 4-9. System 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 and the drives. 3.
Page 76: System Board Components
(POWER2) connector (RISER) diskette/tape drive interface connector front of computer (DSKT) primary EIDE connector (IDE1) CD-ROM interface secondary EIDE connector control-panel connector (CD_IN) (IDE2) connector (PANEL) Figure 4-10. System Board Components Dell OptiPlex GXi Systems Service Manual 4-12...
Page 77: Expansion Cards
Expansion Cards The computer has a removable expansion-card cage. The expansion-card cage contains the riser board and any installed expansion cards. Dell recommends that you remove the expansion-card cage first before removing or installing expansion cards. If you are not removing any of the expansion cards, leave the external cables attached to the expansion cards.
Page 78: Expansion Card
1. Disconnect any external cables from the expansion card being removed. 2. Remove the expansion-card cage. 3. Remove the retaining screw from the card-mounting bracket. 4. Grasp the expansion card by its corners, and carefully remove it from the expansion-card connector. Dell OptiPlex GXi Systems Service Manual 4-14...
Page 79: Riser Board
Riser Board riser-board mounting screws (2) riser-board alignment slot riser board expansion-card cage Figure 4-13. Riser Board Removal To remove the riser board, follow these steps: 1. Remove the expansion-card cage and all expansion cards. 2. Lay the expansion-card cage on a flat work surface with the riser board facing up.
Page 80: Dimms
DIMM is released from its socket. Lift the DIMM away from the socket. securing clips Figure 4-15. DIMM Installation To replace a DIMM, press the DIMM fully into the socket while closing the securing clips to lock the DIMM into the socket. Dell OptiPlex GXi Systems Service Manual 4-16...
Page 81: Cache Memory Card
Cache Memory Card right side of computer cache memory card socket shown without DIMMs for clarity Figure 4-16. Cache-Memory Card Removal To remove the cache memory card, rock the cache memory card from side to side while pulling up on it. Take note of which end of the cache memory card is the pin-1 end (nearest the right side of the system board).
Page 82: Nic Daughter Board
Figure 4-17. NIC Daughter-Board Removal To remove the NIC daughter board, do the following: 1. Remove the NIC daughter-board mounting screw. 2. Pull straight up on the NIC daughter board. Dell OptiPlex GXi Systems Service Manual 4-18...
Page 83: Microprocessor/Heat Sink Assembly
Microprocessor/Heat Sink Assembly heat sink front of computer microprocessor securing clip (hooks over tabs on the socket) microprocessor socket Figure 4-18. Microprocessor Securing-Clip Removal To remove the microprocessor/heat sink assembly, follow these steps: 1. Remove the microprocessor securing clip from the microprocessor/heat sink assembly.
Page 84: Figure 4-19. Microprocessor Removal
NOTE: Pin 1 on the microprocessor is located on the corner with the largest bevel. The pin-1 hole in the microprocessor socket is located on the corner where the holes are in a diagonal pattern. Dell OptiPlex GXi Systems Service Manual 4-20...
Page 85: System Battery
System Battery battery BATTERY socket Figure 4-20. System Battery Removal WARNING: There is a danger of the new battery exploding if it is in- correctly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries accord- ing to the manufacturer’s instructions.
Page 86: System Board
Push evenly on both sides of the system board as you slide it into position (do not twist the system board). Dell OptiPlex GXi Systems Service Manual 4-22...
Page 87: Removing And Replacing Parts On The Midsize Chassis
Midsize Chassis his chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex GXi midsize computer. If you are ser- vicing a Dell OptiPlex GXi low-profile or mini tower computer, use Chapter 4, “Removing and Replacing Parts on the Low-Profile Chassis,” or Chapter 6, “Removing and Replacing Parts on the Mini Tower Chassis.”...
Page 88: Precautionary Measures
If a wrist grounding strap is not available, touch any unpainted metal surface on the back of the computer to discharge any static charge from your body. Dell OptiPlex GXi Systems Service Manual...
Page 89: Floor Stand
loor Stand floor stand screw Figure 5-1. Floor Stand Removal To remove the floor stand, follow these steps: 1. Place the right side of the computer 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 screw.
Page 90: Computer Cover
Four plastic hooks on the inside-front part of the cover secure it to the chassis. Before you reinstall the cover, fold all cables out of the way so that they do not interfere with the cover or with the proper airflow inside the computer. Dell OptiPlex GXi Systems Service Manual...
Page 91: Eject, Power, And Reset Buttons
ject, Power, and Reset Buttons computer cover (upside down) eject button reset button power button Figure 5-3. Eject, Power, and Reset Button Removal To remove the eject, power, and reset buttons, follow these steps: 1. Lay the computer cover upside down on a flat work surface, with the back of the cover facing you.
Page 92: Front-Panel Inserts
To replace a front-panel insert, position the front-panel insert, then press the ring-tabs over the posts. If necessary, use a -inch nutdriver to help push on the ring-tabs. Dell OptiPlex GXi Systems Service Manual...
Page 93: Control Panel
ontrol Panel chassis hooks (2) control panel screw control-panel cable Figure 5-5. Control-Panel Removal To remove the control panel, follow these steps: 1. Remove the hard-disk drive bracket. 2. Disconnect the control-panel cable from the PANEL connector on the system board (see Figure 5-13). 3.
Page 94: Drives
3.5-inch diskette drive DC power cable diskette/tape drive power supply interface cable hard-disk drive bracket EIDE cable secondary EIDE connector (IDE2) primary EIDE connector (IDE1) DSKT connector Figure 5-6. Drive Hardware Dell OptiPlex GXi Systems Service Manual...
Page 95: Externally Accessible Drive Assemblies
Externally Accessible Drive Assemblies bracket-mounting screw drive-mounting screws (2) hooks (2) Figure 5-7. 3.5-Inch Diskette Drive Removal To remove the 3.5-inch diskette drive, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of the 3.5-inch diskette drive.
Page 96: Figure 5-8. 5.25-Inch Drive Assembly Removal
When you replace the 5.25-inch drive, align the front of the drive flush with the tab at the front of the mounting plate. Insert the four screws, and tighten them in the order stamped on the bottom of the 5.25-inch drive-mounting plate. Dell OptiPlex GXi Systems Service Manual 5-10...
Page 97: Hard-Disk Drive Bracket
Hard-Disk Drive Bracket lower-back tab hard-disk drive handle bracket screw Figure 5-10. Hard-Disk Drive Bracket Removal To remove the hard-disk drive bracket, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of each hard-disk drive installed in the hard-disk drive bracket. 2.
Page 98: Hard-Disk Drive
One hard-disk drive attaches to the hard-disk drive bracket at the sides of the drive. The other hard-disk drive attaches to the hard-disk drive bracket at the bottom of the hard-disk drive. 3. Slide the drive out of the hard-disk drive bracket. Dell OptiPlex GXi Systems Service Manual 5-12...
Page 99: System Power Supply
ystem Power Supply power supply DC power cables securing tab slot Figure 5-12. System 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. Free the system power supply from the securing tab labeled RELEASE —>...
Page 100: System Board Components
(POWER2) connector (RISER) diskette/tape drive interface connector front of computer (DSKT) primary EIDE connector CD-ROM interface secondary EIDE connector control-panel (IDE1) connector (CD_IN) (IDE2) connector (PANEL) Figure 5-13. System Board Components Dell OptiPlex GXi Systems Service Manual 5-14...
Page 101: Expansion Cards
Expansion Cards The computer has a removable expansion-card cage. The expansion-card cage contains the riser board and any installed expansion cards. Dell recommends that you remove the expansion-card cage first before removing or installing expansion cards. If you are not removing any of the expansion cards, leave the external cables attached to the expansion cards.
Page 102: Expansion Card
1. Disconnect any cables from the expansion card being removed. 2. Remove the expansion-card cage. 3. Remove the retaining screw from the card-mounting bracket. 4. Grasp the expansion card by its corners, and carefully remove it from the expansion-card connector. Dell OptiPlex GXi Systems Service Manual 5-16...
Page 103: Riser Board
Riser Board riser-board mounting screws (2) riser board slots (2) expansion-card cage Figure 5-16. Riser Board Removal To remove the riser board, follow these steps: 1. Remove the expansion-card cage and all expansion cards. 2. On a flat work surface, turn the expansion-card cage over, with the riser board facing up.
Page 104: Dimms
3. Lift the DIMM away from the socket. securing clips Figure 5-18. DIMM Installation To replace a DIMM, press the DIMM fully into the socket while closing the securing clips to lock the DIMM into the socket. Dell OptiPlex GXi Systems Service Manual 5-18...
Page 105: Cache Memory Card
Cache Memory Card right side of computer cache memory card socket shown without DIMMs for clarity Figure 5-19. Cache-Memory Card Removal To remove the cache memory card, follow these steps: 1. Unlatch and rotate the power supply to the right (see Figure 5-12). 2.
Page 106: Nic Daughter Board
Figure 5-20. NIC Daughter-Board Removal To remove the NIC daughter board, do the following: 1. Remove the NIC daughter-board mounting screw. 2. Pull up on the NIC daughter board. Dell OptiPlex GXi Systems Service Manual 5-20...
Page 107: Microprocessor/Heat Sink Assembly
Microprocessor/Heat Sink Assembly heat sink front of computer microprocessor securing clip (hooks over tabs on the socket) microprocessor socket Figure 5-21. Microprocessor Securing-Clip Removal To remove the microprocessor/heat sink assembly, follow these steps: 1. Unlatch and rotate the power supply to the right (see Figure 5-12). 2.
Page 108: Figure 5-22. Microprocessor Removal
NOTE: Pin 1 on the microprocessor is located on the corner with the largest bevel. The pin-1 hole in the microprocessor socket is located on the corner where the holes are in a diagonal pattern. Dell OptiPlex GXi Systems Service Manual 5-22...
Page 109: System Battery
System Battery battery BATTERY socket Figure 5-23. System Battery Removal WARNING: There is a danger of the new battery exploding if it is in- correctly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries accord- ing to the manufacturer’s instructions.
Page 110: System Board
Push evenly on both sides of the system board as you slide it into position (do not twist the system board). Dell OptiPlex GXi Systems Service Manual 5-24...
Page 111: Removing And Replacing Parts On The Mini Tower Chassis
Mini Tower Chassis his chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex GXi mini tower computer. If you are servicing a Dell OptiPlex GXi low-profile or midsize computer, use Chapter 4, “Removing and Replacing Parts on the Low-Profile Chassis,” or Chapter 5, “Removing and Replacing Parts on the Midsize Chassis.”...
Page 112: Precautionary Measures
If a wrist grounding strap is not available, touch any unpainted metal surface on the back of the computer to discharge any static charge from your body. Dell OptiPlex GXi Systems Service Manual...
Page 113: Computer Cover
omputer Cover release button Figure 6-1. Computer Cover Removal To remove the computer cover, follow these steps: 1. Remove the padlock if one is installed. 2. Facing the left side of the computer, press the release button at the bot- tom-left corner of the front bezel.
Page 114: Front Bezel
1. Press the tab release marked with the icon. 2. Tilt the bezel away from the chassis. 3. Disengage the two retaining hooks at the bottom of the bezel, and pull the bezel away from the chassis. Dell OptiPlex GXi Systems Service Manual...
Page 115: Eject, Power, And Reset Buttons
ject, Power, and Reset Buttons front bezel eject button power button reset button Figure 6-3. Eject, Power, and Reset Button Removal To remove the eject, power, and reset buttons, follow these steps: 1. Lay the front bezel on a flat work surface, with the back of the bezel facing up.
Page 116: Front-Panel Inserts
To replace a 5.25-inch front-panel insert, position the two ring-tabs over the posts on the inside of the bay opening, then press the ring tabs over the posts. Dell OptiPlex GXi Systems Service Manual...
Page 117: Figure 6-5. 3.5-Inch Front-Panel Insert Removal
eject button mechanism back of bezel front of bezel Figure 6-5. 3.5-Inch Front-Panel Insert Removal To remove a 3.5-inch front-panel insert, follow these steps: 1. Hold the bezel with the front facing you. 2. Inside the bezel, press the eject button mechanism toward the front panel to snap the plastic insert out of its opening.
Page 118: Control Panel
3. Remove the mounting screw holding the control panel to the chassis. 4. Slide the control panel out of the hooks holding it to the chassis. Note the routing of the control-panel cable as you remove it from the chassis. Dell OptiPlex GXi Systems Service Manual...
Page 119: Drives
rives Figure 6-7 shows an example of drive hardware that can be installed in the com- puter. Refer to this figure when you perform any of the procedures in the following subsections. diskette/tape drive 3.5-inch diskette drive interface cable DC power cable DSKT connector hard-disk drive bracket secondary EIDE...
Page 120: Externally Accessible Drive Assemblies
2. Press the retaining-tab release button and pull the drive assembly for- ward to remove it. 3. Remove the drive-mounting screw from the left side of the drive, and remove the drive from the bracket (see Figure 6-9). Dell OptiPlex GXi Systems Service Manual 6-10...
Page 121: Figure 6-9. 3.5-Inch Diskette Drive Removal
drive-mounting screw hooks (2) Figure 6-9. 3.5-Inch Diskette Drive Removal When you replace the 3.5-inch diskette drive, be sure the two hooks on the right side of the bracket engage the mounting holes in the side of the 3.5-inch diskette drive.
Page 122: Figure 6-11. 5.25-Inch Drive Removal
When you replace the 5.25-inch drive, align the front of the drive flush with the tab at the front of the mounting plate. Insert the four screws, and tighten them in the order stamped on the bottom of the 5.25-inch drive-mounting plate. Dell OptiPlex GXi Systems Service Manual 6-12...
Page 123: Hard-Disk Drive Bracket
Hard-Disk Drive Bracket drive-cage slide rail chassis slot hinge tabs (3) sliding tab Figure 6-12. Hard-Disk Drive Bracket Removal To remove the hard-disk drive bracket, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of each hard-disk drive installed in the hard-disk drive bracket.
Page 124: Hard-Disk Drive
One hard-disk drive attaches to the hard-disk drive bracket at the sides of the drive. The other hard-disk drive attaches to the hard-disk drive bracket at the bottom of the hard-disk drive. 3. Slide the drive out of the hard-disk drive bracket. Dell OptiPlex GXi Systems Service Manual 6-14...
Page 125: System Power Supply
ystem Power Supply power supply DC power cables slot securing tab power-supply detent link Figure 6-14. System 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.
Page 126: System Board Components
(POWER2) connector (RISER) diskette/tape drive interface connector front of computer (DSKT) primary EIDE CD-ROM interface secondary EIDE connector control-panel connector (IDE1) connector (CD_IN) (IDE2) connector (PANEL) Figure 6-15. System Board Components Dell OptiPlex GXi Systems Service Manual 6-16...
Page 127: Expansion Cards
Expansion Cards The computer has a removable expansion-card cage. The expansion-card cage contains the riser board and any installed expansion cards. Dell recommends that you remove the expansion-card cage first before removing or installing expansion cards. If you are not removing any of the expansion cards, leave the external cables attached to the expansion cards.
Page 128: Expansion Card
1. Disconnect any cables from the expansion card being removed. 2. Remove the expansion-card cage. 3. Remove the retaining screw from the card-mounting bracket. 4. Grasp the expansion card by its corners, and carefully remove it from the expansion-card connector. Dell OptiPlex GXi Systems Service Manual 6-18...
Page 129: Riser Board
Riser Board riser-board mounting screws (2) slots (2) riser board expansion-card cage Figure 6-18. Riser Board Removal To remove the riser board, follow these steps: 1. Remove the expansion-card cage and all expansion cards. 2. Place the expansion-card cage on a flat work surface with the riser board facing up.
Page 130: Dimms
3. Lift the DIMM away from the socket. securing clips Figure 6-20. DIMM Installation To replace a DIMM, press the DIMM fully into the socket while closing the securing clips to lock the DIMM into the socket. Dell OptiPlex GXi Systems Service Manual 6-20...
Page 131: Cache Memory Card
Cache Memory Card right side of computer cache memory card socket shown without DIMMs for clarity Figure 6-21. Cache-Memory Card Removal To remove the cache memory card, follow these steps: 1. Unlatch and rotate the power supply up until it locks (see Figure 6-14). 2.
Page 132: Nic Daughter Board
Figure 6-22. NIC Daughter-Board Removal To remove the NIC daughter board, do the following: 1. Remove the NIC daughter-board mounting screw. 2. Pull up on the NIC daughter board. Dell OptiPlex GXi Systems Service Manual 6-22...
Page 133: Microprocessor/Heat Sink Assembly
Microprocessor/Heat Sink Assembly heat sink front of computer microprocessor securing clip (hooks over tabs on the socket) microprocessor socket Figure 6-23. Microprocessor Securing-Clip Removal To remove the microprocessor/heat sink assembly, follow these steps: 1. Unlatch and rotate the power supply up until it locks (see Figure 6-14). 2.
Page 134: Figure 6-24. Microprocessor Removal
NOTE: Pin 1 on the microprocessor is located on the corner with the largest bevel. The pin-1 hole in the microprocessor socket is located on the corner where the holes are in a diagonal pattern. Dell OptiPlex GXi Systems Service Manual 6-24...
Page 135: System Battery
System Battery battery BATTERY socket Figure 6-25. System Battery Removal WARNING: There is a danger of the new battery exploding if it is in- correctly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries accord- ing to the manufacturer’s instructions.
Page 136: System Board
Push evenly on both sides of the system board as you slide it into position (do not twist the system board). Dell OptiPlex GXi Systems Service Manual 6-26...
Page 137: Appendix A System Setup Program
Appendix A System Setup Program 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.
Page 138: System Setup Screens
System Memory: 16 MB (EDO) Hard Disk: Auto Service Tag: XXXXX Diskette: Auto Asset Tag: XXXXX USB: Speaker: ECC: Tab,Shift-Tab change fields change values Alt-P next Esc exit Alt-B reboot Figure A-1. System Setup Screens Dell OptiPlex GXi Systems Service Manual...
Page 139: Table A-1. System Setup Categories
Table A-1. System Setup Categories Category Function Time Resets time on computer’s internal clock. Date Resets date on computer’s internal calendar. Diskette Drive A Identifies type of diskette drives installed. Cat- Diskette Drive B egory options always match physical locations of drives in computer.
Page 140 Power Management category is disabled. Sound Enables (On) or disables (Off) the integrated sound controller. NIC (TX) Enables (On) or disables (Off) the NIC. Mouse Enables or disables the built-in PS/2- compatible mouse port. Dell OptiPlex GXi Systems Service Manual...
Page 141 Table A-1. System Setup Categories (continued) Category Function Serial Port Configures system’s built-in serial port. Parallel Port Configures system’s built-in parallel port. The port’s I/O address may be set to 278h 3BCh, or 378h Otherwise, the port may be dis- abled.
Page 142 Dell OptiPlex GXi Systems Service Manual...
Page 143: Index
Index Numbers connectors on back of low-profile computer, 1-5 3.5-inch diskette drive removal, 4-8, 5-9, on back of midsize computer, 1-6 6-11 on back of mini tower computer, 1-7 3.5-inch drive assembly removal, 6-10 controllers audio, 1-11 5.25-inch drive assembly removal, 4-9, NIC, 1-11 5-10, 6-11 video, 1-10...
Page 144 3-4 microprocessor removal, 4-19, 5-21, 6-23 securing clip removal, 4-19, 5-21, 6-23 hard-disk drives bracket removal, 5-11, 6-13 options, 1-10 removal, 4-10, 5-12, 6-14 daughter-board removal, 4-18, 5-20, help, getting, 2-6 6-22 description, 1-11 Dell OptiPlex GXi Systems Service Manual...
Page 145 PCI expansion-card connectors SIMMs. See DIMMs low-profile computer, 1-7 specifications, technical, 1-25 midsize computer, 1-8 subsystems mini tower computer, 1-9 EIDE, 1-10 Plug and Play expansion cards, 1-7 expansion, 1-7 POST beep codes memory, 1-21 description, 3-1 system battery removal, 4-21, 5-23, 6-25 list of, 3-2 system board power button removal, 4-4, 5-5, 6-5...
Page 147 ® www.dell.com Printed in the U.S.A. P/N 50560 Rev. A01...

Dell OptiPlex GXi Service Manual

Chapter 1 System Overview

Chapter 2 Basic Troubleshooting

Chapter 3 Beep Codes and Error Messages

Chapter 4 Removing and Replacing Parts on the Low-Profile Chassis

Chapter 5 Removing and Replacing Parts on the Midsize Chassis

Chapter 6 Removing and Replacing Parts on the Mini Tower Chassis

Appendix A System Setup Program

Index

Quick Links

Related Manuals for Dell OptiPlex GXi

Summary of Contents for Dell OptiPlex GXi

Table of Contents