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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.
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Figures Figure 1-1. Figure 1-2. Figure 1-3. Figure 1-4. Figure 1-5. Figure 1-6. Figure 1-7. Figure 1-8. Figure 1-9. Figure 1-10. DC Power Cables for the Low-Profile Computer ..1-12 Figure 1-11. DC Power Distribution for the Low-Profile Computer ..1-13 Figure 1-12.
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IBM®-compatible PCs and prior training in IBM-com- patible 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.
OptiPlex Gs and Gs+ systems are high-speed desktop computers. The Dell OptiPlex Gs and Gs+ systems are available in two sizes: a low-profile desktop computer and a midsize desktop computer. Chapters 1 through 3 and Appendix A contain information that applies to all models of the Dell OptiPlex Gs and Gs+ systems.
In addition to the features found in a standard desktop computer, the Dell Opti- Plex Gs and Gs+ systems include the following new and/or advanced features: • • • • • • • • • • For a complete list of system features, see “Technical Specifications” found later in this chapter.
back left side front Low-Profile Computer Figure 1-1. Computer Orientation power indicator hard-disk drive reset button access indicator Figure 1-2. Front-Panel Features 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 <...
1 connector mouse connector keyboard connector serial port 2 connector Figure 1-3. Internal View of the Low-Profile Computer Dell OptiPlex Gs and Gs+ Systems Service Manual 3.5-inch diskette drive DC power cable NIC connector video connector hard-disk drive...
3.5-inch diskette drive diskette/tape drive interface cable DC power cable power supply AC power receptacle voltage selection switch parallel port connector serial port 1 connector mouse connector keyboard connector serial port 2 connector NIC connector Figure 1-4. Internal View of the Midsize Computer Advanced Expansion Subsystem The Gs and Gs+ systems offers advanced expansion subsystems that can sup- port a mixture of traditional ISA expansion cards (called legacy cards), Plug and...
PCI expansion-card connector and the one ISA expansion-card connector share a single expansion-card slot, resulting in a total of five expansion-card slots (see Figure 1-6). HDLED connector Figure 1-6. Riser Board for the Midsize Computer Dell OptiPlex Gs and Gs+ Systems Service Manual ISA2 connector ISA1 connector PCI2...
Hard-Disk Drive Options Low-Profile Computer The hard-disk drive assembly (consisting of the hard-disk drive and the hard- disk drive bracket) is located inside the left front area of the chassis and is attached to the bottom of the chassis. One EIDE or SCSI 1-inch-high hard-disk drive can be mounted on the hard-disk drive mounting bracket.
Ethernet network. Floor Stand The computers can be used as either a desktop (horizontal) or a mini tower (ver- tical) computer. The floor stand is optional on the low-profile computers and is included with the midsize computers. The floor stand can be attached to the left side of the computer to orient it as a mini tower computer.
omputer Service The following subsections provide service-related information about the computer. System Power Supply The low-profile computer has a 145-W system power supply, whereas the mid- size computer has a 200-W system power supply. Both system power supplies can operate from an AC power source of 115 VAC at 60 Hz or 230 VAC at 50 Hz.
Figure 1-7. DC Power Connector P1 Figure 1-8. DC Power Connectors P2 (Midsize Computer), P3, P4, P5, and P6 (Midsize Computer) 1-10 Dell OptiPlex Gs and Gs+ Systems Service Manual –5 VDC (white) common (black) common (black) common (black)
Figure 1-9. DC Power Connectors P2 (Low-Profile Computer) and P7 (Midsize Computer) DC Power Distribution Figures 1-10 through 1-13 provide the following information about DC power distribution: • Power-supply connector identification • Power cable connections for diskette, tape, CD-ROM, and hard-disk drives •...
SIMM_B must always have SIMMs installed. See “SIMMs” in Chapter 4 or 5, as appropriate for your system, for information on removing and replacing SIMMs. 1-16 Dell OptiPlex Gs and Gs+ Systems Service Manual serial port 2 connector NIC connector (ENET) (SERIAL2)
System Board Jumpers See Figure 1-15 and Table 1-2 for jumper settings and descriptions. NICRST unjumpered jumpered Figure 1-15. System Board Jumpers System Overview 1-17...
DREQ0 DREQ1 DREQ2 DREQ3 DREQ4 DREQ5 DREQ6 DREQ7 1-18 Dell OptiPlex Gs and Gs+ Systems Service Manual Table 1-2. System-Board Jumper Descriptions Description Settings Reserved Do not install a jumper. Microprocessor Install jumper if the microprocessor’s speed internal speed is 133 MHz; otherwise the jumper should not be installed.
nterrupt Assignments Table 1-4. 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 Generated by super I/O controller to indicate that device con- nected to corresponding serial port requires service (IRQ3 for...
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 chapter.
6. Inspect all external monitor controls for any obvious damage or 7. Inspect the keyboard to ensure that no keys are sticking. Dell OptiPlex Gs and Gs+ Systems Service Manual xternal Visual Inspection monitor and peripherals, and their power sources.
8. Inspect the exterior of the computer, all controls and indicators, and all user-accessible data storage devices for any signs of physical damage. Does the inspection reveal any problems? Yes. Refer to the procedures in Chapter 4, “Removing and Replacing Parts in the Low-Profile System,”...
Chapter 1 to locate components in the inspection procedure. To perform the internal visual inspection, follow these steps: 1. Turn off the system, including any attached peripherals, and disconnect Dell OptiPlex Gs and Gs+ Systems Service Manual • Diskette-drive and hard-disk drive access indicators These indicators light up in response to data being transferred to or from the drives.
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2. Remove the computer cover. 3. Verify that all chips, SIMMs, and expansion cards are fully seated in their sockets or connectors. WARNING: The microprocessor/heat sink assembly can get extremely hot. Be sure the assembly has had sufficient time to cool before you touch it.
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.
Dell for technical assistance. For instructions, see “Contacting Dell” in the online System User’s Guide or the chapter titled “Getting Help” in the Diagnostics and Troubleshooting Guide.
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Dell OptiPlex Gs and Gs+ Systems Service Manual...
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.
• • • • • • • Dell OptiPlex Gs and Gs+ Systems Service Manual ystem Error Messages Bad error-correction code (ECC) on disk read Controller has failed Data error Gate A20 failure Hard disk controller failure Hard disk drive read failure...
Table 3-2. System Error Messages Message Definition BIOS found faulty disk Address mark not sector or could not find found particular disk sector. Diskette drive or hard- Attachment disk drive controller failed to cannot send data to respond associated drive. Command entered does Bad command or not exist or is not in...
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SETUP program Keyboard clock line failure Keyboard failure Keyboard controller failure Dell OptiPlex Gs and Gs+ Systems Service Manual Table 3-2. System Error Messages Definition System could not suc- cessfully issue reset command to diskette controller. Diskette write-protect feature activated.
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Table 3-2. System Error Messages Message Definition System cannot commu- Keyboard data nicate with keyboard. line failure Keyboard stuck key failure During memory test, Memory address value read at address line failure at was incorrect. address , read value expecting value Memory data line failure at...
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Error Read fault Requested sector not found Reset failed Sector not found Dell OptiPlex Gs and Gs+ Systems Service Manual Table 3-2. System Error Messages Definition System does not recog- nize diskette drive or hard-disk drive from which it is trying to boot.
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Table 3-2. System Error Messages Message Definition MS-DOS unable to Seek error locate specific track on diskette or hard-disk drive. System could not find Seek operation particular address mark failed on disk. System board chip Shutdown failure faulty. System battery low. Time-of-day clock stopped Time or date setting in...
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Dell Computer Corporation. Write fault Write fault on selected drive 3-10 Dell OptiPlex Gs and Gs+ Systems Service Manual Table 3-2. System Error Messages Definition POST queried EIDE drive for status. Drive detected possible error conditions. MS-DOS cannot write to diskette or hard-disk drive.
Low-Profile System his chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex Gs or Gs+ low-profile computer. If you are servicing a Dell OptiPlex Gs or Gs+ midsize computer, use Chapter 5, “Removing and Replacing Parts in the Midsize System.”...
3. Disconnect any telephone or telecommunications lines from the 4. Wear a wrist grounding strap, and clip it to an unpainted metal sur- Dell OptiPlex Gs and Gs+ Systems Service Manual recautionary Measures WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT power sources to reduce the potential for personal injury.
omputer Cover securing buttons (2) Figure 4-1. Computer Cover Removal To remove the computer cover, follow these steps: 1. Remove the padlock if one is installed. 2. Press the two securing buttons until the cover is free to swing up. 3.
2. To remove the 3.5-inch diskette-drive eject button, pull gently on the 3. To remove the power button and the reset button, use a small screw- Dell OptiPlex Gs and Gs+ Systems Service Manual ject, Power, and Reset Buttons eject button...
ront-Panel Inserts ring-tabs (2) computer cover (upside down) posts (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. 2.
1. Disconnect the control panel cable from the PANEL connector on the 2. From the inside of the chassis, unscrew the mounting screw securing 3. Remove the control panel from the chassis. Dell OptiPlex Gs and Gs+ Systems Service Manual ontrol Panel mounting screw...
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. 3.5-inch diskette drive DC power cable diskette/tape drive interface cable hard-disk drive EIDE cable Figure 4-5.
3. Remove the two drive-mounting screws from the left side of the drive, 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 Gs and Gs+ Systems Service Manual the diskette drive. assembly.
5.25-Inch Drive Assembly 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.
When you reinstall the hard-disk drive assembly, be sure the tabs on the mount- ing plate fully engage the notches on the chassis before you rotate the assembly into place. 4-10 Dell OptiPlex Gs and Gs+ Systems Service Manual the drive. chassis. disk drive to the hard-disk drive bracket.
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.
(VMEM1) riser board connector (RISER) Figure 4-10. System Board Components 4-12 Dell OptiPlex Gs and Gs+ Systems Service Manual ystem Board Components serial port 2 connector NIC connector (ENET) (SERIAL2) front of computer primary EIDE connector secondary EIDE connector...
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.
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 4-14 Dell OptiPlex Gs and Gs+ Systems Service Manual expansion-card connector the expansion-card connector.
Riser Board riser-board mounting screws (2) riser board 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.
Figure 4-15. SIMM Installation To replace a SIMM, place the SIMM fully into the socket at an angle. Pivot the SIMM upward until the tabs lock the SIMM into the socket. 4-16 Dell OptiPlex Gs and Gs+ Systems Service Manual...
Video Memory Chips pin-1 ends Figure 4-16. Video-Memory Chip Removal To remove a video memory chip, follow these steps: 1. Remove the expansion-card cage. 2. Using a chip removal tool, remove the video memory chip. Pull straight up on the video memory chip, being careful not to bend the pins on the chip.
2. Push outward and then upward on the microprocessor-socket release 3. Lift the microprocessor chip out of its socket. 4-18 Dell OptiPlex Gs and Gs+ Systems Service Manual sink assembly. Then remove the heat sink from the microprocessor chip. WARNING: The microprocessor/heat sink assembly can get extremely hot during system operations.
pin-1 corner of socket microprocessor- socket release lever front of computer Figure 4-18. Microprocessor and Heat Sink Assembly If the replacement heat sink and microprocessor are separate, peel the thermal- pad protective cover off the bottom of the heat sink before attaching the heat sink to the microprocessor.
When you replace the system battery, orient the new battery with the “+” facing up. Insert the battery into its socket and snap it into place. Then restore the system configuration information using the printed copy. 4-20 Dell OptiPlex Gs and Gs+ Systems Service Manual battery BATTERY socket of the System Setup screens.
ystem Board screw Figure 4-20. System Board Removal To remove the system board, follow these steps: 1. Disconnect all cables from their connectors at the back of the computer. 2. Remove the expansion-card cage. 3. Disconnect all cables from the system board. 4.
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Midsize System his chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex Gs or Gs+ midsize computer. If you are servicing a Dell OptiPlex Gs or Gs+ low-profile computer, use Chapter 4, “Removing and Replacing Parts in the Low-Profile System.”...
3. Disconnect any telephone or telecommunications lines from the 4. Wear a wrist grounding strap, and clip it to an unpainted metal sur- Dell OptiPlex Gs and Gs+ Systems Service Manual recautionary Measures WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT power sources to reduce the potential for personal injury.
loor Stand 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.
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 Gs and Gs+ Systems Service Manual omputer Cover computer.
ject, Power, and Reset Buttons computer cover (upside down) 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.
2. From the front of the cover, use your thumbs to push inward on the To replace a front-panel insert, position the front-panel insert, and then press the ring-tabs over the posts. If necessary, use a tabs. Dell OptiPlex Gs and Gs+ Systems Service Manual ront-Panel Inserts ring-tabs (2) computer cover...
ontrol Panel 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. Unscrew the mounting screw securing the control panel to the chassis. 4.
Externally Accessible Drive Assemblies bracket-mounting screw drive-mounting screws (2) Figure 5-7. 3.5-Inch Diskette-Drive Assembly 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. 2.
Insert the four screws and tighten them in the order stamped on the bottom of the bracket. 5-10 Dell OptiPlex Gs and Gs+ Systems Service Manual the drive. the drive assembly forward to remove it.
Hard-Disk Drive Bracket lower-back tab 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.
1. Remove the hard-disk drive bracket. 2. Remove the four screws that secure the hard-disk drive to the hard-disk 3. Slide the drive out of the hard-disk drive bracket. 5-12 Dell OptiPlex Gs and Gs+ Systems Service Manual drive-mounting screws (4) for side-mounted drive hard-disk drive drive bracket.
ystem Power Supply power supply securing tab 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 —>...
(VMEM1) riser board connector (RISER) Figure 5-13. System Board Components 5-14 Dell OptiPlex Gs and Gs+ Systems Service Manual ystem Board Components serial port 2 connector NIC connector (SERIAL2) (ENET) front of computer primary EIDE connector secondary EIDE connector...
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.
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 5-16 Dell OptiPlex Gs and Gs+ Systems Service Manual expansion card expansion-card connector the expansion-card connector.
Riser Board mounting screws (2) 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. Lay the expansion-card cage on a flat work surface with the riser board facing up.
Figure 5-18. SIMM Installation To replace a SIMM, place the SIMM fully into the socket at an angle. Pivot the SIMM upward until the tabs lock the SIMM into the socket. 5-18 Dell OptiPlex Gs and Gs+ Systems Service Manual...
Video Memory Chip pin-1 ends Figure 5-19. Video-Memory Chip Removal To remove a video memory chip, follow these steps: 1. Remove the expansion-card cage. 2. Using a chip removal tool, remove the video memory chip. Pull straight up on the video memory chip, being careful not to bend the pins on the chip.
3. Push outward and then upward on the microprocessor-socket release 4. Lift the microprocessor chip out of its socket. 5-20 Dell OptiPlex Gs and Gs+ Systems Service Manual sink assembly. Then remove the heat sink from the microprocessor chip. WARNING: The microprocessor/heat sink assembly can get extremely hot during system operations.
microprocessor-socket release lever pin-1 corner of socket front of computer Figure 5-21. Microprocessor and Heat Sink Assembly If the replacement heat sink and microprocessor are separate, peel the thermal- pad protective cover off the bottom of the heat sink before attaching the heat sink to the microprocessor.
Insert the battery into its socket and snap it into place. Then restore the sys- tem configuration information using the printed copy. 5-22 Dell OptiPlex Gs and Gs+ Systems Service Manual battery BATTERY socket of the System Setup screens.
ystem Board screw Figure 5-23. System Board Removal To remove the system board, follow these steps: 1. Disconnect all cables from their connectors at the back of the computer. 2. Remove the expansion-card cage. 3. Unlatch and rotate the power supply to the right (see Figure 5-12). 4.
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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.
NOTE: For all EIDE devices obtained from Dell, set the appropriate AUTO BASE MEMORY Displays amount of memory available to MS-DOS programs that do not use extended or expanded memory.
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BOOT SEQUENCE SETUP PASSWORD AUTO POWER ON POWER MANAGEMENT MOUSE Dell OptiPlex Gs and Gs+ Systems Service Manual Table A-1. System Setup Categories Function Determines whether keyboard’s Num Lock mode is activated at system start-up. Enables or disables reporting of keyboard errors during POST.
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Table A-1. System Setup Categories Category Function SERIAL PORT 1 Configures system’s built-in serial port 1. The port can be set to figure the port, to disable the port. SERIAL PORT 2 Configures system’s built-in serial port 2. The port can be set to figure the port, to disable the port.
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