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Page 2 Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden. Trademarks used in this text: Dell , the DELL logo, and OptiPlex are registered trademarks of Dell Computer Corporation; MS-DOS , Microsoft , and Windows are registered trademarks of Microsoft Corporation; Intel and Pentium are registered trademarks and MMX is a trademark of Intel Corporation;...
Page 3 Chassis Differences......... . . 1-2 Chassis Similarities .
Page 4 System-Board Service Data ....... . . 1-16 System Board ........1-16 System Board Jumpers .
Page 5 5.25-Inch Drive Assembly ....... 4-11 Hard-Disk Drive Assembly ........4-12 System Power Supply .
Page 6 Recommended Tools ......... 6-1 Precautionary Measures .
Page 7 Mini Tower Chassis); P3, P4, P5, P6, and P9 (All OptiPlex G1 Chassis)......1-22 Figure 1-15.
Page 8 Figure 5-6. Control Panel Removal ......5-8 Figure 5-7. Drive Hardware ........5-9 Figure 5-8.
Page 9 DREQ Line Assignments......1-19 Table 1-4. OptiPlex G1 DC Voltage Ranges ....1-21 Table 1-5.
Page 10 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 11 (see Figure 1-1). Chapters 1 through 3 and Appendix A contain information that applies to all models of the OptiPlex G1 family; Chapters 4, 5, and 6 are chassis-specific. Low-Profile Chassis Midsize Chassis...
Page 12 The three OptiPlex G1 chassis configurations differ primarily in the following expansion features: Number of expansion slots available for PCI/ISA expansion cards Number of available internal drive bays for EIDE drives Number of available external drive bays for diskette, CD-ROM, or tape...
Page 13 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 G1 systems ranges from a minimum of 32 MB to a maximum of 256 MB. All main memory is implemented using high-speed non-ECC DIMMs.
Page 14 The OptiPlex G1 systems are equipped with an integrated diskette/tape drive controller (PIIX4e) that can support a maximum of two non-EIDE diskette and tape drives via a 34-pin DSKT connector located on the system board. The low- profile chassis can accommodate only one external drive device (diskette drive or tape drive).
Page 15 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 G1 systems are available with or without integrated Ethernet NIC subsystem. ® The integrated 10/100-Mbps 3Com...
Page 16 Dell OptiPlex G1 systems have a special power supply that provides trickle (“flea”) power to support the Wakeup On LAN feature when computer power is off.
Page 17 Figure 1-2 shows the front-panel features for the three chassis types; Figures 1-3 through 1-5 show internal features of the three chassis types. diskette-drive removable media device diskette-drive power button power indicator hard-disk drive access indicator access indicator reset button Low-Profile Chassis diskette-drive removable...
Page 18 1 connector mouse expansion-card slots (3) connector keyboard connector USB connectors (2) NIC connector (optional) serial port 2 connector video connector security cable slot Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 19 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 USB connectors (2)
Page 20 USB connectors (2) serial port 2 connector chassis intrusion switch video connector expansion-card cage NIC connector (optional) system board riser board padlock ring 1-10 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 21 Throughout this manual, references to component locations assume the chas- sis orientations illustrated in Figure 1-6. back back system power power board system supply supply board right left left right side side side side removable hard-disk media device drive diskette diskette removable drive...
Page 22 HDLED connector The OptiPlex G1 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 23 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 1-8). Both riser board options include the P1 connector (for connecting the NIC to the riser board cable) and an LED.
Page 24 The two DIMM sockets on the system board can accommodate combinations of 32-, 64-, and 128-MB, 64-bit nonparity DIMMs, up to a total memory capac- ity of 256 MB. 1-14 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 25 Perform asset-tracking functions Download and run the diagnostics over the network Dell OptiPlex G1 computers are shipped with an online System User’s Guide (located in the Dell Accessories folder) that provides additional hardware and software installation, configuration information, and Dell contact information.
Page 26 The following subsections provide service-related information about the sys- tem board and components. The OptiPlex G1 systems are equipped with a standard system board (inte- grated NIC is optional). serial port 2 microprocessor connector (SERIAL2) mouse/keyboard fan connector video connector...
Page 27 jumpered unjumpered RSVD1 Reserved Jumper not installed (default). 450MHZ Micro- Install jumper if the microprocessor’s processor internal speed is 450 MHz; otherwise, the speed jumper should not be installed. 400MHZ Micro- Install jumper if the microprocessor’s processor internal speed is 400 MHz; otherwise, the speed jumper should not be installed.
Page 28 Generated by super I/O controller to indicate that diskette or tape drive requires service. IRQ7 Generated by super I/O controller to indicate that device con- nected to parallel port requires service. 1-18 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 29 IRQ8 Generated by RTC alarm event. IRQ9 Available for use by an expansion card. IRQ10 Available for use by an expansion card. NIC/default PCI IRQ. IRQ11 IRQ12 Generated by keyboard controller to indicate that mouse’s output buffer is full. IRQ13 Generated by math coprocessor to indicate coprocessor error.
Page 30 NOTE: The power supply produces DC voltages only under its loaded condi- tion. Therefore, when you measure these voltages, the DC power input connectors must be connected to their corresponding power input connectors on the system board or drives. 1-20 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 31 +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 3.0 A (low-profile computers);...
Page 32 Table 1-4. 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) 1-22 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 33 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 1-20 provide the following information about DC power distribution: Power-supply connector identification Power cable connections for diskette, tape, CD-ROM, and hard-disk drives Power distribution to sockets and connectors on the system board System Overview 1-23...
Page 34 NOTE: +5 VFP is routed to internal core regulator the optional integrated NIC hard-disk drive +3.3 VDC logic on the system board core VCC +2.1 to +3.5 VDC and to P1 on the riser board. 1-24 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 35 System Overview 1-25...
Page 36 VCC +2.1 to +3.5 VDC and to P1 on the riser optional board. drive Some computers have an additional connector (P9) that may be used instead of P5 or P6. 1-26 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 37 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 +5 VDC system +5 VDC +5 VDC +5 VDC...
Page 38 (two share expansion-card slots) Mini tower computers ... five (two PCI connectors share expansion- card slots with ISA connectors) 1-28 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 39 ISA expansion-card connectors: Low-profile computers ... two (one ISA connector and one PCI con- nector share an expansion-card slot) Midsize computers ..three (one ISA connector and one PCI con- nector share an expansion-card slot) two (both share expansion-card slots) Mini tower...
Page 40 40-pin connectors on PCI local bus Diskette drive ..34-pin connector ATI multimedia ..40-pin connector 1-30 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 41 <Ctrl><Alt><Del>... restarts (reboots) the system <F2> ....starts System Setup program (during the POST only) <Ctrl><Alt><\>...
Page 42 0.5 G at 3 to 200 Hz at 1 octave/min 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. 1-32 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 43 Maximum shock: Operating ... . left side (for low-profile and midsize com- puters operating in a vertical orientation) and bottom half-sine pulse with a change in velocity of 50.8 cm/sec (20 inches/sec) Storage .
Page 44 1-34 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 45 This chapter provides basic troubleshooting procedures applicable to all sys- tems of the Dell OptiPlex G1 Managed PC family. A brief explanation of how to load and start the system diagnostics is also provided at the end of the chap- ter.
Page 46 For proper connection of the video monitor, see the documentation for the monitor. For proper settings of the video monitor controls, see the documentation for the monitor. If one or more keys are sticking, it may be necessary to replace the keyboard. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 47 Does the inspection reveal any problems? Yes . Refer to the parts removal and replacement procedure in Chapters 4, 5, or 6, as appropriate for your system. No . Proceed to the next section, “Observing the Boot Routine.” After you have performed an external visual inspection as described in the pre- vious section, you should boot the system and, while the boot routine is running, observe the system for any indications of problems.
Page 48 When you perform the visual inspection, refer to Figures 1-3 through 1-5, as appropriate for your system, for component location information. To perform the internal visual inspection, follow these steps: Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 49 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, or 6, as appropriate for your system.
Page 50 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 51 This chapter describes the beep codes and error messages that are common to all members of the Dell OptiPlex G1 Managed PC family of computers. These error messages can occur during the POST or, in the case of some fail- ures, during normal system operation.
Page 52 4-2-2 Shutdown failure 4-2-3 Gate A20 failure 4-2-4 Unexpected interrupt in protected mode 4-3-1 Memory failure above Faulty or improperly seated address 0FFFFh DIMM 4-3-3 Timer-chip counter 2 failure Defective system board Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 53 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 54 Hard-disk drive failed to Incorrect configuration initialize. settings in System Setup program, improperly con- nected hard-disk drive cable, faulty hard-disk drive controller sub- system (defective system board), or loose power cable. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 55 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 56 Improperly connected failed. diskette/tape drive, hard- disk drive interface cable, or power cable. MS-DOS unable to Defective sectors on dis- locate sector on dis- kette or hard-disk drive. kette or hard-disk drive. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 57 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 58 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 59 This chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex G1 low-profile computer. If you are ser- vicing a midsize or mini tower chassis, use Chapter 5 or 6, as appropriate for your system. Unless otherwise noted, each procedure assumes the following: You have performed the steps in “Precautionary Measures”...
Page 60 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 system from ESD. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 61 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. diskette drive removable media device in external bay drive cage for external drive power supply internal...
Page 62 Dell offers an optional stand that you can attach to the computer for a mini tower (vertical) orientation. Although you can attach (and remove) the stand at any time with a minimum of system disruption, it is easiest to attach before you set up your computer and connect the back-panel cables.
Page 63 securing buttons (2) front of 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 64 (upside down) 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. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 65 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 66 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. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 67 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 68 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. 4-10 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 69 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 70 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. 4-12 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 71 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 72 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 73 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 4-15...
Page 74 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. 4-16 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 75 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 system board and install them on the replacement board.
Page 76 (INTRUSION) (IDE1) (DSKT) control panel connector (PANEL) front of computer To remove a DIMM from one of the two DIMM sockets, follow these steps: 4-18 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 77 securing clips (2) securing clips (2) notch video-memory video-memory upgrade socket upgrade module Removing and Replacing Parts on the Low-Profile Chassis 4-19...
Page 78 System Setup program. If the total memory is listed incorrectly, repeat steps 1 through 6 to reseat the video-memory upgrade module and verify that the computer acknowl- edges the module. 4-20 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 79 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 80 Then slide the SEC cartridge release latches out- ward to lock the assembly onto the metal standoffs. battery BATTERY socket To remove the system battery, follow these steps: 4-22 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 81 Removing and Replacing Parts on the Low-Profile Chassis 4-23...
Page 82 4-24 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 83 This chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex G1 midsize computer. If you are servic- ing a low-profile or mini tower chassis, use Chapter 4 or 6, as appropriate for your system. Unless otherwise noted, each procedure assumes the following: You have performed the steps in “Precautionary Measures”...
Page 84 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 system from ESD. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 85 Dell offers an optional stand that you can attach to the computer for a mini tower (vertical) orientation. Although you can attach (and remove) the stand at any time with a minimum of system disruption, it is easiest to attach before you set up your computer and connect the back-panel cables.
Page 86 To remove the stand, turn the computer over so the stand is at the top, loosen the screw and lift the stand away, and then place the computer in a horizontal position. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 87 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 88 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. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 89 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 90 (2) mounting screw 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. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 91 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 92 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. 5-10 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 93 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 94 (be sure that the opening in the lower-back tab is over the alignment tab on the chassis); then rotate the front of the bracket down into position. 5-12 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 95 drive-mounting screws for drive-mounting screws bottom-mounted drive (4) for side-mounted drive (4) 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 96 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 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 97 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 98 To remove an expansion card, follow these steps: 5-16 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 99 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 100 NIC connector. 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 5-18 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 101 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 102 To remove a DIMM from one of the two DIMM sockets, follow these steps: securing clips (2) securing clips (2) 5-20 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 103 notch video-memory video-memory upgrade socket upgrade module You can upgrade video memory from 2 to 4 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 104 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 105 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 106 5-24 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 107 This chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex G1 mini tower computer. If you are ser- vicing a low-profile or midsize chassis, use Chapter 4 or 5, as appropriate for your system. Unless otherwise noted, each procedure assumes the following: You have performed the steps in “Precautionary Measures”...
Page 108 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 system from ESD. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 109 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. power supply external drive bays hard-disk drive bracket expansion-card...
Page 110 NOTE: After removing and replacing the chassis, the chassis intrusion detector alerts you that the cover has been removed. Refer to “ Chassis Intrusion Detec- tion ” in Chapter 1 for instructions on resetting the chassis intrusion detector. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 111 tab release retaining hooks (2) To remove the front bezel, follow these steps: Removing and Replacing Parts on the Mini Tower Chassis...
Page 112 To remove the eject, power, and reset buttons, follow these steps: When these clips are released, the button comes free from the bezel. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 113 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 114 (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. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 115 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 116 To remove a 3.5-inch diskette drive assembly, follow these steps: 6-10 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 117 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) Removing and Replacing Parts on the Mini Tower Chassis 6-11...
Page 118 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. 6-12 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 119 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 onto the drive-cage slide rail.
Page 120 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. 6-14 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 121 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 122 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 123 expansion card card-slot retaining screw opening card-mounting bracket riser board expansion-card connector To remove an expansion card, follow these steps: Removing and Replacing Parts on the Mini Tower Chassis 6-17...
Page 124 (2) slots (2) expansion-card cage To remove the riser board, follow these steps: 6-18 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 125 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 system board and install them on the replacement board.
Page 126 (MONITOR) primary EIDE interface connector optional (IDE1) integrated NIC connector (ENET) secondary EIDE interface connector (IDE2) system board jumpers video-memory riser board connector (RISER) upgrade socket ATI multimedia (VIDEO_UPGRADE) connector (AMC) 6-20 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 127 To remove a DIMM from one of the two DIMM sockets, follow these steps: securing clips (2) securing clips (2) Removing and Replacing Parts on the Mini Tower Chassis 6-21...
Page 128 2 and 3. As the system boots, it automatically detects the presence of the new video-memory upgrade module and automatically changes the system con- figuration information in the System Setup program. 6-22 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 129 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 130 Then slide the SEC cartridge release latches out- ward to lock the assembly onto the metal standoffs. battery BATTERY socket To remove the system battery, follow these steps: 6-24 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 131 Removing and Replacing Parts on the Mini Tower Chassis 6-25...
Page 132 6-26 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 133 This appendix, which applies to all Dell OptiPlex G1 Managed PC computer families, 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: If you wait too long and the operating system begins to load into memory, let the system complete the load operation ;...
Page 134 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 135 System Time Resets time on computer’s internal clock. System Date Resets date on computer’s internal calendar. Diskette Drive A Identifies type of diskette drives installed. Diskette Drive B Options always match physical locations of drives in computer. Tape drives are not reflected in these options.
Page 136 Power Management option is disabled. Asset Tag Displays the customer-programmable asset tag number for the system if an asset tag number has been assigned. Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 137 boot routine observing while troubleshooting, 3.5-inch diskette drive removal low-profile computer, 4-10 bracket, hard-disk drive, removal midsize computer, 5-10 midsize computer, 5-12 mini tower computer, 6-10 mini tower computer, 6-13 5.25-inch drive assembly removal low-profile computer, 4-11 midsize computer, 5-11 mini tower computer, 6-11 cabling network, requirements, 1-5...
Page 138 See diskette drives, hard-disk drive access indicator, 1-7 drives, hard-disk drives, tape NIC activity indicator, 1-5 drives, CD-ROM drives NIC link integrity indicator, 1-5 power button, 1-7 power indicator, 1-7 reset button, 1-7 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 139 diskette drives removal, low-profile computer, 4-10 removal, midsize computer, 5-10 EIDE subsystem, 1-3 removal, mini tower computer, 6-11 eject button removal diskette/tape drive controller, 1-4 low-profile computer, 4-6 midsize computer, 5-6 diskette-based diagnostics, 2-6 mini tower computer, 6-6 DMA channel assignments, 1-19 error messages, 3-3 documentation, online, 1-15 Ethernet NIC subsystem, 1-5...
Page 140 1-13 options, upgrade, 1-14 jumpers, 1-17 PCI expansion-card connectors low-profile computer, 1-12 midsize computer, 1-12 mini tower computer, 1-13 key to enter System Setup program, pin assignments DC power connectors, 1-22 Dell OptiPlex G1 Managed PC Systems Service Manual...
Page 141 Plug and Play expansion cards, 1-12 resource conflicts eliminating, 2-5 ports on back of low-profile computer, riser board removal low-profile computer, 4-16 on back of midsize computer, 1-9 midsize computer, 5-17 on back of mini tower computer, mini tower computer, 6-18 1-10 POST beep codes, 3-1 power button removal...
Page 142 2-3 diagnostics, 2-6 Wakeup On LAN, 1-5 error messages, 3-3 warnings, 4-2, 5-2, 6-2 external visual inspection, 2-2 initial procedures, 2-1 internal visual inspection, 2-4 resource conflicts, 2-5 service-related information, 1-15 Dell OptiPlex G1 Managed PC Systems Service Manual...
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Dell OptiPlex G1 Service Manual

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