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Page 2 LANDesk are registered trademarks of 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 3: Table Of Contents
Chassis Differences......... . . 1-2 Chassis Similarities .
Page 4 System Diagnostics ........1-17 System-Board Service Data .
Page 5 Recommended Tools......... . 4-1 Precautionary Measures .
Page 6 Drives ........... . . 5-9 Externally Accessible Drive Assemblies .
Page 7 System Board Components........6-21 DIMMs..........6-22 Video Memory .
Page 8 Chassis); P3, P4, P5, P6, and P9 (All OptiPlex GX1 Chassis) ......1-24 Figure 1-17. DC Power Connectors P2 (Low-Profile Chassis) and P7 (All OptiPlex GX1 Chassis) .
Page 9 Figure 4-16. DIMM Removal ........4-17 Figure 4-17.
Page 10 DREQ Line Assignments ......1-20 Table 1-4. OptiPlex GX1 DC Voltage Ranges ....1-22 Table 1-5.
Page 11 xiii...
Page 12 A prerequisite for using this manual to service Dell computer systems is a basic ® knowledge of IBM -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 procedures and instructions on using the Dell diagnostics to test the computer system.
Page 13 The OptiPlex NX1 system is available only in the OptiPlex NX1 chassis (see Figure 1-1). Chapters 1 through 3 and Appendix A contain information that applies to all models of the OptiPlex GX1 and OptiPlex NX1 families; Chapters 4, 5, 6, and 7 are chassis-specific. System Overview...
Page 14 Midsize Chassis Mini Tower Chassis OptiPlex NX1 Chassis The three OptiPlex GX1 and the OptiPlex NX1 chassis configurations differ pri- marily in the following expansion features: Number of expansion slots available for PCI/ISA expansion cards Number of available internal drive bays for EIDE/SCSI drives...
Page 15 512 KB of pipeline-burst SRAM cache memory. The L2 cache SRAM is located in the SEC cartridge/heat sink assembly on the system board. Main memory for the OptiPlex GX1 and OptiPlex NX1 systems ranges from a minimum of 32 MB to a maximum of 384 MB. All main memory is implemented using high-speed ECC and non-ECC DIMMs.
Page 16: Standard Features
Chapter 2,“Basic Troubleshooting” . As a standard feature, OptiPlex GX1 and OptiPlex NX1 systems are equipped with Self-Monitoring and Analysis Reporting Technology (SMART), which warns you at system start-up if your hard-disk drive has become unreliable.
Page 17 Chapter 2, “Basic Troubleshooting.” The OptiPlex GX1 and OptiPlex NX1 systems include an integrated high- performance 64-bit accelerated graphics port (AGP) subsystem, implemented on the system board, which drives an external SVGA monitor. The AGP con-...
Page 18 NOTE: If a setup password has been assigned by someone else, contact your network administrator for information on resetting the chassis intrusion detector. The OptiPlex GX1 systems and OptiPlex NX1 systems are available with or without integrated Ethernet NIC subsystem. ®...
Page 19 OptiPlex NX1 chassis configurations. Dell OptiPlex GX1 and OptiPlex NX1 systems have a special power supply that provides trickle (“flea”) power to support the Wakeup On LAN feature when computer power is off.
Page 20 diskette-drive power button power indicator hard-disk drive access indicator access indicator reset button Low-Profile Chassis power button hard-disk drive power indicator access indicator reset button Midsize Chassis diskette-drive access indicator power indicator power button hard-disk drive reset button access indicator Mini Tower Chassis power button power...
Page 21 3.5-inch diskette drive diskette/tape drive interface cable power supply hard-disk drive padlock ring interface cable hard-disk drive voltage selection chassis switch intrusion switch AC power receptacle parallel port connector expansion-card cage serial port 1 connector mouse expansion-card slots (3) connector keyboard connector audio connectors (3)
Page 22 3.5-inch diskette drive diskette/tape drive interface cable drive cage hard-disk drive power supply bracket AC power receptacle voltage chassis selection intrusion switch switch hard-disk drive padlock ring interface cable parallel port connector expansion-card cage serial port 1 connector expansion-card slots (5) mouse connector keyboard connector audio connectors (3)
Page 23 AC power receptacle power supply security cable slot parallel port external connector drive bays serial port 1 connector keyboard connector mouse hard-disk drive connector bracket interface cable USB connectors (2) serial port 2 connector chassis intrusion switch video connector expansion-card NIC connector (optional) cage system board...
Page 24 NIC connector (optional) cable slot video connector The OptiPlex GX1 systems contain 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. For non-Plug and Play operating system environments, an ISA Configuration Utility (ICU) included with the computer provides a means of avoiding resource conflicts.
Page 25 The OptiPlex GX1 midsize computers have five expansion-card slots. The riser board is offered in two options. Option 1 is a passive riser board, with no PCI- to-PCI bridge. Option 1 has three ISA expansion-card connectors and three PCI expansion-card connectors.
Page 26 board, with a PCI-to-PCI bridge. Option 2 has two ISA expansion-card connec- tors and five PCI expansion-card connectors. Two PCI/ISA expansion-card connector pairs each share an expansion-card slot, again resulting in a total of five expansion-card slots (see Figure 1-10). Both riser board options include the P1 connector (for connecting the NIC to the riser board cable) and an LED.
Page 27 Chapters 4, 5, 6, and 7 . On the OptiPlex GX1 and OptiPlex NX1 systems, the microprocessor and sec- ondary L2 cache memory are implemented in an SEC cartridge/heat sink assembly. Upgrade to a higher-performance microprocessor is accomplished by snapping out the old assembly and installing an upgrade assembly as higher-performance microprocessors become available.
Page 28 Unless otherwise specified, the information applies to all chassis configurations. For OptiPlex GX1 and OptiPlex NX1 systems equipped with the optional inte- grated Wakeup On LAN-capable NIC, the following tasks may be performed by a system administrator at a remote location:...
Page 29 Server-based and diskette-based diagnostics are available to aid in trouble- shooting all major components of the three Dell OptiPlex GX1 chassis. The OptiPlex NX1 systems use server-based diagnostics, hard-disk–based diagnos- tics, or the diskette-based diagnostics using an external diskette-drive kit connected directly to the system board.
Page 30 jumpered unjumpered RSVD1 Reserved Jumper not installed (default). 450MHZ Micro- Reserved. Jumper not installed (default). processor speed 400MHZ Micro- Install jumper if the microprocessor’s processor internal speed is 400 MHz; otherwise, the speed jumper should not be installed. 350MHZ Micro- Install jumper if the microprocessor’s processor internal speed is 350 MHz;...
Page 31 333MHZ Micro- Install jumper if the microprocessor’s processor internal speed is 333 MHz; otherwise, the speed jumper should not be installed. 300MHZ Micro- Reserved. Jumper not installed (default). processor speed 266MHZ Micro- Install jumper if the microprocessor’s processor internal speed is 266 MHz; otherwise, the speed jumper should not be installed.
Page 32 NOTE: The built-in audio controller, NIC (optional), and video controllers are assigned available DMA channels automatically during system start-up. The following subsections provide service-related information about hard-disk drive options for the OptiPlex GX1 (low-profile, midsize, and mini tower) and OptiPlex NX1 computers. 1-20...
Page 33 NOTE: Throughout this manual, references to component locations assume the chassis orientations illustrated in Figure 1-14. back back left right side side left right side side front front OptiPlex NX1 Chassis Low-Profile Chassis back left right side side back front bottom front Mini Tower Chassis...
Page 34 The hard-disk drive bracket is located beneath the externally accessible drive bays at the front of the computer. The hard-disk drive bracket can contain 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-disk drive.
Page 35 –12 VDC –10.80 to –13.20 VDC 0.3 A (low-profile computers); 0.3 A (midsize and mini tower computers) –5 VDC –4.50 to –5.50 VDC 0.3 A (low-profile computers); 0.3 A (midsize and mini tower computers) +4.75 to +5.25 VDC 10 mA +5 VFP VFP (volts flea power) —...
Page 36 P2, P3, P5, P6, P9 +12 VDC (yellow) +5 VDC (red) common (black) common (black) common (black) common (black) +5 VDC (red) +12 VDC (yellow) P2, P7 +3.3 VDC (blue/white) +3.3 VDC (blue/white) +3.3 VDC (blue/white) common (black) common (black) common (black) Figures 1-18 through 1-22 provide the following information about DC power distribution:...
Page 37 System Overview 1-25...
Page 38 1-26...
Page 39 System Overview 1-27...
Page 40 system board keyboard controller +3 VDC battery riser board power RTC/ management +3.3 VDC NVRAM and NIC logic PCI1 +5 VDC POWER1 through +12 VDC PWRGOOD PCI3 –12 VDC PSON# PSON# +5 VFP +5 VFP +5 VFP system +5 VDC +5 VDC +5 VDC +5 VDC...
Page 41 keyboard system board controller +3 VDC battery riser board power RTC/ management +3.3 VDC NVRAM and NIC logic PCI1 +5 VDC POWER1 through +12 VDC PWRGOOD PCI5 –12 VDC PSON# PSON# +5 VFP +5 VFP +5 VFP system +5 VDC +5 VDC +5 VDC ISA1...
Page 42 +3.3 VDC +3.14 to +3.47 VDC 6.0 A +5 VDC +4.75 to +5.25 VDC 12.0 A +12 VDC +11.40 to +12.60 VDC 1.0 A –12 VDC –10.80 to –13.20 VDC 0.5 A +4.75 to +5.25 VDC 1.2 A +5 VFP The combined load on the +5-VDC and +3.3-VDC outputs should not exceed 65 W.
Page 43 +3.3 VDC (blue/white) +3.3 VDC (blue/white) +3.3 VDC (blue/white) common (black) common (black) common (black) +5 VDC (red) common (black) common (black) +12 VDC (yellow) Figures 1-26 and 1-27 provide the following information about DC power distribution: Power-supply connector identification Power cable connection for the hard-disk drive Power distribution to sockets and connectors on the system board System Overview...
Page 44 system board +3 VDC battery power RTC/ management NVRAM and NIC logic P1 POWER_1 PWRGOOD PSON# PSON# +5 VFP +5 VFP system +3.3 VDC +3.3 VDC power supply +5 VDC +5 VDC +5 VDC +5 VDC PCI1 +12 VDC +12 VDC +12 VDC +12 VDC –12 VDC...
Page 45: Pentium Ii Microprocessor
Microprocessor type ..Intel Pentium II microprocessor with MMX technology Microprocessor speed ..266, 333, 350, or 400 MHz External system clock ..66/100 MHz Internal cache... . 32-KB (16-KB data cache and 16-KB instruc- tion cache) Math coprocessor .
Page 46 ISA expansion-card connectors: Low-profile computers ... two (one ISA connector and one PCI connector share an expansion-card slot) Midsize computers ..three (one ISA connector and one PCI connector share an expansion-card slot) two (both share expansion-card slots) Mini tower...
Page 47 Mini tower computers ... one 3.5-inch bay for a 3.5-inch diskette drive; three 5.25-inch bays for diskette, tape, or CD-ROM drives OptiPlex NX1 computers ... none Internal hard-disk drive bays: Low-profile...
Page 48 6-pin mini-DIN NIC....RJ45 connector (optional on OptiPlex GX1 and OptiPlex NX1 systems) USB ....
Page 49 Reset control ... . push button Power control... . push button Power indicator ..green LED in normal operation;...
Page 50 Low-profile computers: Height ....10.9 cm (4.3 inches) Width ....40.89 cm (16.1 inches) Depth .
Page 51 Maximum shock: Operating ... . left side (for low-profile, midsize, and Opti- Plex NX1 computers operating in a vertical orientation) and bottom half-sine pulse with a change in velocity of 20 inches/sec (50.8 cm/sec) Storage .
Page 52 1-40...
Page 53 This chapter provides basic troubleshooting procedures applicable to all systems of the Dell OptiPlex GX1 Managed PC and OptiPlex NX1 Net PC fam- ilies. A brief explanation of how to load and start the system diagnostics is also provided at the end of the chapter. Dell recommends that you perform the fol- lowing procedures in the order they are presented in this manual.
Page 54: External Visual Inspection
Is the problem a result of user error? Yes . Instruct the user in the proper procedure, or direct him or her to the appropriate user documentation for the correct procedure. No . Proceed to the next section, “External Visual Inspection.” The external visual inspection consists of a quick inspection of the exterior of the computer, the monitor, the keyboard, any peripherals, and cables.
Page 55: Observing The Boot Routine
If one or more keys are sticking, it may be necessary to replace the keyboard. Does the inspection reveal any problems? Yes . Refer to the parts removal and replacement procedure in Chapters 4, 5, 6, or 7 , as appropriate for your system. No .
Page 56: Internal Visual Inspection
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, troubleshoot the diskette drive or hard-disk drive subsystem, as appropriate.
Page 57: Eliminating Resource Conflicts
The microprocessor is physically located in a SEC cartridge/heat sink assembly on the system board. To reseat the microprocessor, remove the SEC cartridge/heat sink assembly and reinstall it as described in “SEC Cartridge/Heat Sink Assembly” in Chapter 4, 5, 6, or 7 , as appropriate for your system.
Page 58: Device List
The OptiPlex GX1 systems use either diskette-based or server-based diagnos- tics. The OptiPlex NX1 systems use either server-based, hard-disk–based, or (optionally) diskette-based diagnostics using an external diskette-drive kit connected to the computer as shown in Figure 2-1 and described in “Diskette- Based Diagnostics”...
Page 59 the tests are completed or stopped, the total number of errors is reported; there is no error log. The server-based diagnostics consists of the following test groups: Coprocessor Tests — Check the math coprocessor’s numerical calculation and error-handling abilities CMOS Confidence Test — Checks the NVRAM for accessibility and reliabil- ity of data storage DMA Controller Test —...
Page 60 ; then shut down the system and try again. Starting the diagnostics causes the Dell logo 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 61: Diskette-Based Diagnostics
The OptiPlex GX1 systems use either diskette-based or server-based diagnos- tics. The OptiPlex NX1 systems use either server-based, hard-disk–based or optionally diskette-based diagnostics using an external diskette-drive kit con- nected to the computer as shown in Figure 2-1 and described in the following procedure.
Page 62 To install the external diskette drive, follow these steps: To run the diskette-based diagnostics, follow these steps: Starting the diagnostics causes the Dell logo to appear on the monitor screen, followed by a message indicating that the diagnostics is loading.
Page 63: Hard-Disk–Based Diagnostics (Optiplex Nx1 Systems Only)
Dell for technical assistance. For instructions, see “Contacting Dell” in the online Network Administrator’s Guide or online System User’s Guide.
Page 64 2-12...
Page 65: Running The System Diagnostics
This chapter describes the beep codes and error messages that are common to all members of the Dell OptiPlex GX1 Managed PC and OptiPlex NX1 Net PC family of computers. These error messages can occur during the POST or, in the case of some failures, during normal system operation. 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 66 1-3-1 Main-memory refresh verifi- Faulty or improperly seated cation failure DIMM or defective system board 1-3-2 No memory installed No memory installed or faulty or improperly seated DIMM 1-3-3 Chip or data line failure in the Faulty or improperly seated first 64 KB of main memory DIMM 1-3-4...
Page 67 4-3-4 Time-of-day clock stopped Bad battery or defective system board 4-4-1 Serial-port test failure Faulty I/O chip (defective system board) 4-4-2 Parallel-port test failure Faulty system board 4-4-3 Math coprocessor failure Faulty microprocessor chip or system board 4-4-4 Cache test failure Defective microprocessor or system board System error messages typically are presented on the screen during the POST...
Page 68 Computer received un- Faulty diskette, diskette recoverable data-read drive, or hard-disk drive. error from diskette or hard-disk drive. Read/write failure One or more DIMMs during POST prevents faulty or improperly system from using avail- seated. able memory. Diskette/tape drive con- Faulty or improperly troller could not locate inserted diskette,...
Page 69 System Setup program Incorrect configuration contains incorrect settings in System Setup system configuration program or faulty battery. settings. System cannot commu- Keyboard cable connec- nicate with keyboard. tor loose or improperly connected, defective keyboard, or defective keyboard/mouse control- ler (defective system board).
Page 70 Software in use con- Faulty application or flicts with operating utility. system, application, or utility. Memory test did not POST memory test complete. terminated by pressing the . System does not recog- Faulty diskette, diskette/ nize diskette drive or tape drive subsystem, hard-disk drive from hard-disk drive, hard-disk which it is trying to...
Page 71 MS-DOS unable to Defective diskette or locate specific track on hard-disk drive. diskette or hard-disk drive. System could not find Faulty diskette or hard- particular address mark disk drive. on disk. System board chip Defective system board. faulty. Backup battery low. Defective battery or faulty chip (defective sys- tem board).
Page 73: Precautionary Measures
This chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex GX1 low-profile computer. If you are servicing a midsize, mini tower, or OptiPlex NX1 Net PC chassis, use Chapter 5, 6, or 7 , as appropriate for your system.
Page 74 Figure 4-1 shows an internal view of the interior of the low-profile computer and identifies major components for orientation. Refer to this illustration, as needed, when performing the component removal/replacement procedures in this chapter.
Page 75 diskette drive CD-ROM drive in external bay drive cage for external drive power supply internal hard- disk drive chassis intrusion switch expansion-card cage system board securing buttons (2) front of computer Removing and Replacing Parts on the Low-Profile Chassis...
Page 76: Inside The Computer
To remove the computer cover, follow these steps: Three 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 proper airflow inside the computer.
Page 77 When these clips are released, the button comes free from the front panel of the cover. 5.25-inch front-panel insert computer cover (upside down) posts (2) ring-tabs (2) To remove a front-panel insert, follow these steps: To replace a 5.25-inch front-panel insert, position the two ring-tabs over the posts on the inside of the bay opening, and then press the ring-tabs over the posts.
Page 78 chassis mounting screw control panel cable control panel mounting tab To remove the control panel, follow these steps: When you reinstall the control panel, be sure to put the right side of the control panel behind the mounting tab.
Page 79 Figure 4-6 shows an example of drive hardware that can be installed in the computer. 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 5.25-inch drive bay and bracket power supply...
Page 80 drive-mounting screws (2) 3.5-inch diskette-drive-assembly latches (2) front of computer hooks (2) To remove the 3.5-inch diskette drive assembly, follow these steps: Rotate the left side of the assembly up, and lift the assembly out of the chassis. When you replace the 3.5-inch diskette drive, be sure that the mounting holes on the right side of the drive engage the two hooks on the bracket.
Page 81 front of computer drive-mounting screws (4) To remove a 5.25-inch drive assembly, follow these steps: When you replace the 5.25-inch drive, place the front of the drive toward the front of the bracket; then install the four screws, but do not tighten them. Align the screws with the score marks on the bracket, and tighten the screws in the order stamped on the bottom of the bracket.
Page 82 hard-disk drive mounting screws (4) tabs (2) captive screw notches (2) front of computer To remove the hard-disk drive, follow these steps: When you reinstall the hard-disk drive assembly, be sure that the tabs on the back of the mounting plate fully engage the notches on the chassis—before you rotate the assembly into place.
Page 83 power supply power-supply mounting screw To remove the system power supply, follow these steps: When you replace the system power supply, place it down inside the chassis and against the right side of the chassis. Then slide the system power supply toward the back of the chassis, and hook the tabs into the right side of the power supply.
Page 84 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 85 retaining screw expansion card card-mounting bracket expansion-card connector card-slot opening riser board To remove an expansion card, follow these steps: Removing and Replacing Parts on the Low-Profile Chassis 4-13...
Page 86 riser-board mounting screws (2) riser-board alignment slot riser board expansion-card cage To remove the riser board, follow these steps: When you replace the riser board, be sure that the alignment feature on the expansion-card cage engages with the alignment slot. 4-14...
Page 87 screw slots (5) tabs (5) To remove the system board, follow these steps: NOTES: If you are replacing the system board, remove all DIMMs, the video-memory upgrade module (if present), the single-edge contact (SEC) cartridge/heat sink assembly, and the guide bracket assembly from the old sys- tem board and install them on the replacement board.
Page 88 When you reinstall the system board (before you slide the system board back to lock it in position), push down near each slot to engage the grounding clip onto its corresponding tab. Push evenly on both sides of the system board as you slide it into position (do not twist the system board).
Page 89 To remove a DIMM from one of the three DIMM sockets, follow these steps: securing clips (2) securing clips (2) Removing and Replacing Parts on the Low-Profile Chassis 4-17...
Page 90 notch video-memory video-memory upgrade module upgrade socket You can upgrade video memory from 4 to 8 MB by installing a video-memory upgrade module in the video-memory upgrade socket on the system board. Adding additional video memory increases the system’s video performance and provides additional modes for high-resolution/expanded color applications.
Page 91 To take advantage of future options in processor speed and functionality, you can replace the microprocessor on your system board with any Dell-supported microprocessor upgrade. The microprocessor upgrade kit is shipped with an SEC cartridge/heat sink assembly, which includes the microprocessor, micro- processor heat sink, and L2-cache memory module.
Page 92 To remove the SEC cartridge/heat sink assembly, follow these steps: NOTE: When installing the SEC cartridge/heat sink assembly, carefully orient the assembly and press firmly with up to 25 pounds of force to mate the SEC cartridge with its connector. Then slide the SEC cartridge release latches out- ward to lock the assembly onto the metal standoffs.
Page 93 Removing and Replacing Parts on the Low-Profile Chassis 4-21...
Page 94 4-22...
Page 95 This chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex GX1 midsize computer. If you are servicing a low-profile, mini tower, or OptiPlex NX1 Net PC chassis, use Chapter 4, 6, or 7 , as appropriate for your system.
Page 96 Figure 5-1 shows an internal view of the midsize computer and identifies major components for orientation. Refer to this illustration, as needed, when per- forming the component removal/replacement procedures in this chapter.
Page 97 3.5-inch diskette drive external drive bays diskette/tape drive interface cable hard-disk drive bracket power supply hard-disk drive system board interface cable expansion-card cage Removing and Replacing Parts on the Midsize Chassis...
Page 98: Optional Stand
optional-stand screw To remove the optional stand, follow these steps: Use your fingers or a wide flat-blade screwdriver to unscrew the optional- stand screw. Disengage the three orientation nubs that position and help hold the optional stand to the computer.
Page 99: Computer Cover
securing buttons (2) front of computer To remove the computer cover, follow these steps: 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 proper airflow inside the computer.
Page 100: Eject, Power, And Reset Buttons
computer cover (upside down) eject button reset button power button To remove the eject, power, and reset buttons, follow these steps: When these clips are released, the button comes free from the front panel of the cover.
Page 101: Front-Panel Inserts
5.25-inch front-panel computer cover insert (upside down) posts (2) ring-tabs (2) To remove a front-panel insert, follow these steps: To replace a 5.25-inch front-panel insert, position the two ring-tabs over the posts on the inside of the bay opening, and then press the ring-tabs over the posts.
Page 102: Control Panel
screw chassis hooks (2) control panel control panel cable To remove the control panel, follow these steps: Note the routing of the control panel cable as you remove it from the chassis.
Page 103: Drives
Figure 5-7 shows an example of drive hardware that can be installed in the computer. Refer to this figure when you perform any of the procedures in the following subsections. system DC power diskette/tape drive power cable interface cable supply 3.5-inch diskette drive hard-disk drive bracket...
Page 104 bracket-mounting screw drive-mounting screws (2) hooks (2) front of computer To remove the 3.5-inch diskette drive, follow these steps: When you replace the 3.5-inch diskette drive, be sure that 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 105 retaining tabs (2) To remove a 5.25-inch drive assembly from the middle or lower drive bay, fol- low these steps: Align the front of the drive flush with the tab at the front of the 5.25-inch drive-mounting plate. drive-mounting screws (4) Removing and Replacing Parts on the Midsize Chassis 5-11...
Page 106 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. lower-back tab hard-disk drive bracket...
Page 107 drive-mounting screws (4) for drive-mounting screws bottom-mounted drive (4) for side-mounted drive hard-disk drive bracket hard-disk drive To remove the hard-disk drive, follow these steps: 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.
Page 108 power supply DC power cables securing tab slot To remove the system power supply, follow these steps: Press the securing tab to the left to release the power supply. 5-14...
Page 109: Expansion-Card Cage
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 expansion cards, leave the external cables attached to them.
Page 110 retaining screw expansion card card-mounting bracket expansion-card connector card-slot opening riser board To remove an expansion card, follow these steps: 5-16...
Page 111 riser-board mounting screws (2) slots (2) riser board expansion-card cage To remove the riser board, follow these steps: Removing and Replacing Parts on the Midsize Chassis 5-17...
Page 112: System Board
screw slots (5) tabs (5) To remove the system board, follow these steps: NOTES: If you are replacing the system board, remove all DIMMs, the video-memory upgrade module (if present), the single-edge contact (SEC) cartridge/heat sink assembly, and the guide bracket assembly from the old sys- tem board and install them on the replacement board.
Page 113: System Board Components
onto its corresponding tab. Push evenly on both sides of the system board as you slide it into position (do not twist the system board). The subsections that follow Figure 5-18 contain procedures for removing/ replacing system board components. optional NIC connector serial port 2...
Page 114 To remove a DIMM from one of the three DIMM sockets, follow these steps: securing clips (2) securing clips (2) 5-20...
Page 115: Video Memory
notch video-memory video-memory upgrade socket upgrade module You can upgrade video memory from 4 to 8 MB by installing a video-memory upgrade module in the video-memory upgrade socket on the system board. Adding additional video memory increases the system’s video performance and provides additional modes for high-resolution/expanded color applications.
Page 116: Microprocessor
To take advantage of future options in processor speed and functionality, you can replace the microprocessor on your system board with any Dell-supported microprocessor upgrade. The microprocessor upgrade kit is shipped with an SEC cartridge/heat sink assembly, which includes the microprocessor, micro- processor heat sink, and L2-cache memory module.
Page 117: System Battery
To remove the SEC cartridge/heat sink assembly, follow these steps: NOTE: When installing the SEC cartridge/heat sink assembly, carefully orient the assembly and press firmly with up to 25 pounds of force to mate the SEC cartridge with its connector. Then slide the SEC cartridge release latches out- ward to lock the assembly onto the metal standoffs.
Page 118 5-24...
Page 119 This chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex GX1 mini tower computer. If you are servicing a low-profile, midsize, or OptiPlex NX1 Net PC chassis, use Chapter 4, 5, or 7 , as appropriate for your system.
Page 120 Figure 6-1 shows an internal view of the interior of the mini tower computer and identifies major components for orientation. Refer to this illustration, as needed, when performing the component removal/replacement procedures in this chapter.
Page 121 power supply external drive bays hard-disk drive bracket expansion-card system cage board riser board Removing and Replacing Parts on the Mini Tower Chassis...
Page 122 release button To remove the computer cover, follow these steps: Before you reinstall the cover, fold all cables out of the way so that they do not interfere with the cover or with proper airflow inside the computer.
Page 123: Front Bezel
tab release retaining hooks (2) To remove the front bezel, follow these steps: Removing and Replacing Parts on the Mini Tower Chassis...
Page 124: Eject, Power, And Reset Buttons
front bezel eject button power button reset button To remove the eject, power, and reset buttons, follow these steps: When these clips are released, the button comes free from the bezel.
Page 125: Front-Panel Inserts
front bezel posts (2) 5.25-inch front-panel insert ring-tabs (2) To remove a 5.25-inch front-panel insert, follow these steps: To replace a 5.25-inch front-panel insert, position the two ring-tabs over the posts on the inside of the bay opening, and then press the ring-tabs over the posts.
Page 126 eject button mechanism back of bezel front of bezel To remove a 3.5-inch front-panel insert, follow these steps: To replace the 3.5-inch front-panel insert, work from outside the bezel. Place the insert in position, and press it into the opening.
Page 127: Control Panel
chassis hooks (2) control panel control panel cable screw To remove the control panel, follow these steps: Note the routing of the control panel cable as you remove it from the chassis. Removing and Replacing Parts on the Mini Tower Chassis...
Page 128: Drives
Figure 6-8 shows an example of drive hardware that can be installed in the computer. Refer to this figure when you perform any of the procedures in the following subsections. diskette/tape drive 3.5-inch diskette interface cable drive DC power cable hard-disk drive bracket DSKT connector secondary EIDE...
Page 129: Inch Diskette Drive Assembly
retaining-tab release button To remove a 3.5-inch diskette drive assembly, follow these steps: Removing and Replacing Parts on the Mini Tower Chassis 6-11...
Page 130 drive-mounting screw hooks (2) When you replace the 3.5-inch diskette drive, be sure that the two hooks on the right side of the bracket engage the mounting holes in the side of the 3.5-inch diskette drive. retaining tabs (2) 6-12...
Page 131: Inch Drive Assembly
To remove a 5.25-inch drive assembly from the middle or lower drive bay, fol- low these steps: Align the front of the drive flush with the tab at the front of the 5.25-inch drive-mounting plate. screws (4) 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.
Page 132: Hard-Disk Drive Bracket
drive-cage slide rail chassis slot hinge tabs (3) sliding tab To remove the hard-disk drive bracket, follow these steps: When you reinstall the hard-disk drive bracket, insert the bracket’s hinge tabs into the chassis slot so that the tabs hook over the slot. Then rotate the bracket toward the drive cage, and fit the bracket’s sliding tab on the drive-cage slide rail.
Page 133: Hard-Disk Drive Assembly
sliding tab drive-mounting screws (4) for side-mounted drive hard-disk drive hard-disk drive bracket drive-mounting screws (4) for bottom-mounted drive To remove the hard-disk drive assembly, follow these steps: One hard-disk drive attaches to the hard-disk drive bracket at the sides of the drive.
Page 134: System Power Supply
DC power cables power supply slot power-supply detent link securing tab To remove the system power supply, follow these steps: Press the securing tab to release the power supply. When you reinstall the system power supply, place the power-supply detent link over the pin on the power supply as you position the power supply in the chassis opening.
Page 135: 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 expansion cards, leave the external cables attached to them.
Page 136 expansion card retaining screw card-slot opening card-mounting bracket riser board expansion-card connector To remove an expansion card, follow these steps: 6-18...
Page 137 riser-board riser board mounting screws (2) slots (2) expansion-card cage To remove the riser board, follow these steps: Removing and Replacing Parts on the Mini Tower Chassis 6-19...
Page 138: System Board
screw slots (5) tabs (5) To remove the system board, follow these steps: NOTES: If you are replacing the system board, remove all DIMMs, the video-memory upgrade module (if present), the single-edge contact (SEC) cartridge/heat sink assembly, and the guide bracket assembly from the old sys- tem board and install them on the replacement board.
Page 139: Dimms
onto its corresponding tab. Push evenly on both sides of the system board as you slide it into position (do not twist the system board). The subsections that follow Figure 6-20 contain procedures for removing/ replacing system board components. parallel/serial port 1 telephony DIMM sockets (3)
Page 140 To remove a DIMM from one of the three DIMM sockets, follow these steps: securing clips (2) securing clips (2) 6-22...
Page 141: Video Memory
notch video-memory video-memory upgrade module upgrade socket You can upgrade video memory from 4 to 8 MB by installing a video-memory upgrade module in the video-memory upgrade socket on the system board. Adding additional video memory increases the system’s video performance and provides additional modes for high-resolution/expanded color applications.
Page 142: Sec Cartridge/Heat Sink Assembly
To take advantage of future options in processor speed and functionality, you can replace the microprocessor on your system board with any Dell-supported microprocessor upgrade. The microprocessor upgrade kit is shipped with an SEC cartridge/heat sink assembly which includes the microprocessor, micro- processor heat sink, and L2-cache memory module.
Page 143: System Battery
To remove the SEC cartridge/heat sink assembly, follow these steps: NOTE: When installing the SEC cartridge/heat sink assembly, carefully orient the assembly and press firmly with up to 25 pounds of force to mate the SEC cartridge with its connector. Then slide the SEC cartridge release latches out- ward to lock the assembly onto the metal standoffs.
Page 144 6-26...
Page 145 This chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex NX1 Net PC computer. If you are ser- vicing a low-profile, midsize, or mini tower chassis, use Chapter 4, 5, or 6, as appropriate for your system.
Page 146: Optiplex Nx1 Computer
Figure 7-1 shows an internal view of the interior of the OptiPlex NX1 computer and identifies major components for orientation. Refer to this illustration, as needed, when performing the component removal/replacement procedures in this chapter.
Page 147 power supply system board hard-disk drive expansion-card cage captive screw locator pins (2) (on underside of stand) front bezel To remove the optional stand, if one is installed, follow these steps: Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis...
Page 148 Disengage the locator pins that position and help secure the stand to the computer. When reinstalling the optional stand, align the front edge of the stand with the groove between the front bezel and the computer cover. Move the stand until the locator pins engage the holes in the side of the computer.
Page 149 To remove the computer cover, follow these steps: security cable slot padlock ring service access lock Four plastic hooks at the front 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 proper airflow inside the computer.
Page 150 cable retention tabs (2) mounting screw control panel cable chassis tabs (3) To remove the control panel, follow these steps: When you reinstall the control panel, place the control panel between the tabs in the chassis. Before reinstalling the power supply, be sure to route the con- trol panel cable under the retention tabs on the chassis wall.
Page 151 hard-disk drive expansion-card cage hard-disk drive mounting screws (4) To remove a hard-disk drive, follow these steps: Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis...
Page 152 power supply EIDE cable system- board power-supply DC power retention tab cables (2) hard-disk drive DC power cable cable tabs (2) chassis tabs (2) AC power receptacle screw To remove the system power supply, follow these steps: When you reinstall the system power supply, place it in front of the two tabs on the bottom of the chassis.
Page 153 The computer has a removable expansion-card cage. The expansion-card cage contains the hard-disk drive, the riser board, and any installed expansion card. You must remove the expansion-card cage to remove or install the hard-disk drive, an expansion card, or the riser board. expansion-card cage EIDE cable power...
Page 154 card-slot opening expansion-card connector riser board card mounting bracket retaining screw expansion card To remove the expansion card, follow these steps: 7-10...
Page 155 expansion-card cage tabs (2) riser board slots (2) riser-board mounting screw To remove the riser board, follow these steps: When you replace the riser board, be sure that the two tabs on the expansion- card cage engage the riser board slots. Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7-11...
Page 156 system board back of computer screw slots (5) tabs (5) To remove the system board, follow these steps: NOTES: If you are replacing a system board, remove the microprocessor/heat sink assembly, video-memory upgrade module (if present), and the DIMMs from the old system board and install them on the replacement board. Also, if the original system board has a NIC connector, ensure that the replace- ment system board has a NIC connector.
Page 157 The subsections that follow Figure 7-12 contain procedures for removing sys- tem board components. optional NIC connector serial port 2 microphone microprocessor (ENET) connector (SERIAL2) jack (MIC) mouse/keyboard fan connector video connector connectors (FAN) (MONITOR) line-out jack USB connectors (2) (stacked) (LINE-OUT) (USB)
Page 158 To remove a DIMM from one of the three DIMM sockets, follow these steps: securing clips (2) securing clips (2) 7-14...
Page 159 notch video-memory video-memory upgrade module upgrade socket You can upgrade video memory from 4 to 8 MB by installing a video-memory upgrade module in the video-memory upgrade socket on the system board. Adding additional video memory increases the system’s video performance and provides additional modes for high-resolution/expanded color applications.
Page 160 To take advantage of future options in processor speed and functionality, you can replace the microprocessor on your system board with any Dell-supported microprocessor upgrade. The microprocessor upgrade kit is shipped with a single-edge contact (SEC) cartridge/heat sink assembly which includes the microprocessor, microprocessor heat sink, and L2-cache memory module.
Page 161 To remove the SEC cartridge/heat sink assembly, follow these steps: NOTE: When installing the SEC cartridge/heat sink assembly, carefully orient the assembly and press firmly with up to 25 pounds of force to mate the SEC cartridge with its connector. Then slide the SEC cartridge release latches out- ward to lock the assembly onto the metal standoffs.
Page 162 7-18...
Page 163 This appendix, which applies to all Dell OptiPlex GX1 Managed PC and Opti- Plex NX1 Net PC computer families, describes the System Setup program, which is used to change the system configuration information stored in NVRAM on the system board.
Page 164 ;;;;; ;;;;; ;;;;; ;;;;;...
Page 165 System Setup Program...
Page 166 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. Tape drives are not reflected in these categories.
Page 167 Chassis Intrusion Displays the status of the system chassis intrusion monitor. If computer cover is removed, the setting changes from Not Detected (default setting) to Detected. (An alert message is also displayed during the boot sequence at system start-up.) To clear this field and allow future intrusions to be detected, enter the System Setup program during the system’s POST and use the left- or...
Page 168 Wakeup On LAN Wakeup On LAN determines whether the Wakeup On LAN feature is set to Off or On. You must reboot your system before a change takes effect. Sound Enables (On) or disables (Off) the integrated sound controller. Enables (On) or enables without PXE support (On [PXE Off]) or disables (Off) the integrated NIC.
Page 169 Device List provides access to the Device List screen where you can choose from a list of available boot devices to boot from and specify the order in which your computer attempts to boot from these devices. To view the Device List screen, press ...
Page 170 NOTE: If you exit the Device List option by pressing or with- out making any changes, the Boot Sequence category is set to the Device List option. PgDn next 1 of 2 PgUp prev ;;;;; ;;;;;...

Page 171 block diagram low-profile computer, 1-26 3.5-inch diskette drive removal midsize computer, 1-28 low-profile computer, 4-8 mini tower computer, 1-29 midsize computer, 5-10 OptiPlex NX1 computer, 1-32 mini tower computer, 6-11 boot routine 5.25-inch drive assembly removal observing while troubleshooting, low-profile computer, 4-9 midsize computer, 5-11 bracket, hard-disk drive, removal mini tower computer, 6-12...

Page 172 computer (continued) controllers components, illustrated, low-profile audio, 1-5 computer, 1-9 diskette/tape drive, 1-4 components, illustrated, midsize EIDE, 1-4 computer, 1-10 Ethernet NIC, 1-6 components, illustrated, mini tower video, 1-5 computer, 1-11 controls and indicators components, illustrated, OptiPlex front-panel views, 1-7 NX1 computer, 1-12 hard-disk drive access indicator, 1-8 controls and indicators, 1-7...

Page 173 DC power (continued) drives (continued) power supply connectors, 1-31 CD-ROM drive removal, low-profile computer, 4-9 voltage ranges, OptiPlex GX1 systems, 1-30 CD-ROM drive removal, midsize computer, 5-11 voltage ranges, OptiPlex NX1 systems, 1-30 CD-ROM drive removal, mini tower computer, 6-12...

Page 174 expansion-card removal hard-disk drives (continued) low-profile computer, 4-13 removal, OptiPlex NX1 computer, midsize computer, 5-16 service information, 1-20 mini tower computer, 6-18 SMART technology, 1-4 OptiPlex NX1 computer, 7-10 hard-disk–based diagnostics, 2-7 expansion-card slots low-profile computer, 1-13 heat sink/SEC cartridge assembly. midsize computer, 1-13 See SEC cartridge/heat sink mini tower computer, 1-15...

Page 175: Secondary L2 Cache
1-28 connector indicators, 1-6 cables, OptiPlex NX1 computer, controller, 1-6 1-31 optional support, 1-6 DC voltage ranges, OptiPlex GX1, 1-22 DC voltages ranges, OptiPlex NX1, 1-30 flea power, 1-7 power distribution, 1-32 online documentation, 1-16...

Page 176: Smart Technology
power supply (continued) stand removal voltage ranges, OptiPlex NX1 midsize computer, 5-4 computer, 1-30 OptiPlex NX1 computer, 7-3 precautionary measures subsystems low-profile computer, 4-1 audio, 1-5 midsize computer, 5-1 expansion, 1-12 mini tower computer, 6-1 memory, 1-16 OptiPlex NX1 computer, 7-1 NIC, 1-6 SVGA, 1-5 switch, AC voltage selection, 1-7...

Page 177: Telephony Application Programming Interface
1-6 external, 2-2 tools, recommended internal, 2-4 low-profile computer, 4-1 voltage ranges midsize computer, 5-1 OptiPlex GX1 computers, 1-22 mini tower computer, 6-1 OptiPlex NX1 computers, 1-30 OptiPlex NX1 computer, 7-1 voltage selection switch, AC troubleshooting low-profile computer, 1-9...

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