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____________________ Information in this document is subject to change without notice. © 1996–1998 Dell Computer Corporation. All rights reserved. Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.
&RQWHQWV &KDSWHU 6\VWHP 2YHUYLHZ Chassis Differences. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Chassis Similarities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Pentium II Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System-Board Service Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . System Board Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interrupt Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DMA Channel Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hard-Disk Drive Service Information . . . . . . . . . . . . . . . .
Inside the Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Computer Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Eject, Power, and Reset Buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 Front-Panel Inserts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Expansion Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Expansion-Card Cage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Expansion Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Riser Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
&KDSWHU 5HPRYLQJ DQG 5HSODFLQJ 3DUWV RQ WKH 2SWL3OH[ 1; 1HW 3& &KDVVLV Recommended Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 Precautionary Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 Inside the Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 Optional Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-15. DC Power Connector P1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 Figure 1-16. DC Power Connectors P2 (Midsize and Mini Tower Chassis); P3, P4, P5, P6, and P9 (All OptiPlex GX1/GX1p Chassis). . . . . . . . . . . . . . . . . . . . . 1-25 Figure 1-17. DC Power Connectors P2 (Low-Profile Chassis) and P7 (All OptiPlex GX1/GX1p Chassis). . . . . . . . . . . . . . . 1-25 Figure 1-18. DC Power Cables for the Low-Profile Computer . . . . . . . . 1-26 Figure 1-19.
Figure 5-2. Figure 5-3. Figure 5-4. Figure 5-5. Figure 5-6. Figure 5-7. Figure 5-8. Figure 5-9. Figure 5-10. Figure 5-11. Figure 5-12. Figure 5-13. Figure 5-14. Figure 5-15. Figure 5-16. Figure 5-17. Figure 5-18. Figure 5-19. Figure 5-20. Figure 5-21. Figure 5-22. Figure 5-23. Figure 6-1. Figure 6-2. Figure 6-3. Figure 6-4. Figure 6-5. Figure 6-6. Figure 6-7. Figure 6-8. Figure 6-9. Figure 6-10. Figure 6-11. Figure 6-12. Figure 6-13. Figure 6-14. Figure 6-15. Figure 6-16. Figure 6-17. Figure 6-18.
7DEOHV xii Figure 6-21. Figure 6-22. Figure 6-23. Figure 6-24. Figure 6-25. Figure 7-1. Figure 7-2. Figure 7-3. Figure 7-4. Figure 7-5. Figure 7-6. Figure 7-7. Figure 7-8. Figure 7-9. Figure 7-10. Figure 7-11. Figure 7-12. Figure 7-13. Figure 7-14. Figure 7-15. Figure 7-16. Figure 7-17. Figure A-1. Figure A-2. DIMM Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22 DIMM Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
xiii
5HDG 7KLV )LUVW 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.
&+$37(5 6\VWHP 2YHUYLHZ This manual contains field-servicing information for the Dell® OptiPlex® GX1/ GX1p Managed PC and OptiPlex NX1 Net PC family of computers. The Dell OptiPlex GX1/GX1p and OptiPlex NX1 systems are high-speed (266-, 333-, 350-, 400or 450-MHz), upgradable desktop computers built around high-performance Intel® Pentium® II microprocessors with MMX™ technology. The OptiPlex GX1p systems are available only with 400-MHz or 450-MHz processors.
Low-Profile Chassis Midsize Chassis Mini Tower Chassis OptiPlex NX1 Chassis )LJXUH &KDVVLV &RQILJXUDWLRQV &KDVVLV 'LIIHUHQFHV The four different 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/SCSI drives Number of available external drive bays for diskette, CD-ROM, or tape drives Physical size and power supply types (the midsize and mini tower syst
&KDVVLV 6LPLODULWLHV All four chassis configurations have the following similarities: The same system board. Identical operational characteristics (same BIOS, POST, memory, microprocessor, external I/O ports, and so on). Identical diagnostics, diagnostic beep codes, and diagnostic-screen error messages (see Chapters 1 through 3 and Appendix A).
0DLQ 0HPRU\ Main memory for the OptiPlex GX1 and OptiPlex NX1 systems ranges from a minimum of 32 MB to a maximum of 384 MB. Main memory for the OptiPlex GX1p system ranges from a minimum of 128 MB to a maximum of 384 MB. All main memory for the OptiPlex GX1 and OptiPlex NX1 systems is implemented using high-speed error checking and correction (ECC) and non-ECC DIMMs. All main memory for the OptiPlex GX1p system is implemented using high-speed ECC DIMMs.
,QWHJUDWHG 'LVNHWWH 7DSH 'ULYH &RQWUROOHU The OptiPlex GX1/GX1p and OptiPlex NX1 systems are equipped with an integrated diskette 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). Other chassis configurations can accommodate two external drive devices.
$7, 0XOWLPHGLD &KDQQHO The ATI multimedia channel (AMC) implements a local graphics bus that allows external devices to attach directly to the graphics controller. The AMC allows devices to transfer video stream data to the graphics controller, for example, MPEG-2 decoding for digital video disk (DVD) applications, or to receive video stream data from the graphics controller to the device, for example, TV-Out circuitry, or to do both simultaneously.
,QWHJUDWHG (WKHUQHW 1,& 6XSSRUW 2SWLRQDO The OptiPlex GX1 systems and OptiPlex NX1 systems are available with or without an integrated Ethernet NIC subsystem. The OptiPlex GX1p systems are available only with an integrated Ethernet NIC subsystem. The integrated 10/100-Mbps 3Com® PCI 3C905B-TX Ethernet NIC subsystem supports the Wakeup On LAN feature and the 10BASE-T and 100BASE-T standards. The NIC subsystem connects to the Ethernet network through a single RJ45 connector on the back of the computer.
836 The OptiPlex GX1/GX1p and OptiPlex NX1 systems are equipped with a switch-selectable (115/230-VAC) UPS that can operate from standard AC power outlets in the U.S. and all international countries. The power supply used in the midsize and mini tower chassis configurations is a higher-capacity power supply than that used in the low-profile and OptiPlex NX1 chassis configurations.
power button power indicator diskette-drive access indicator hard-disk drive access indicator reset button Low-Profile Chassis diskette-drive access indicator power button hard-disk drive access indicator power indicator reset button Midsize Chassis diskette-drive access indicator power indicator power button hard-disk drive access indicator reset button Mini Tower Chassis power button power indicator hard-disk drive access indicator OptiPlex NX1 Chassis )LJXUH )URQW 3DQHO )HDWXUHV Sy
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AC power receptacle power supply security cable slot parallel port connector external drive bays serial port 1 connector keyboard connector mouse connector hard-disk drive bracket interface cable USB connectors (2) serial port 2 connector chassis intrusion switch video connector expansion-card cage NIC connector (optional) system board audio connectors (3) padlock ring riser board )LJXUH ,QWHUQDO 9LHZ RI WKH 0LQL 7RZHU &KDVVLV 1-12 Dell OptiPlex GX1/GX1p Managed PC and OptiPlex NX1 Net P
chassis intrusion switch power supply DC power cable padlock ring security access lock EIDE cable parallel port connector serial port 1 connector hard-disk drive mouse connector expansion-card cage keyboard connector expansion-card slot USB connectors (2) AC power receptacle serial port 2 connector security cable slot NIC connector (optional) video connector )LJXUH ,QWHUQDO 9LHZ RI WKH 2SWL3OH[ 1; &KDVVLV $GYDQFHG ([SDQVLRQ )HDWXUHV The OptiPlex GX1/GX1p systems contain advanced expansio
2SWL3OH[ 1; &RPSXWHU·V ([SDQVLRQ &DUG 6ORW The OptiPlex NX1 computer has one PCI expansion-card connector on the riser board (see Figure 1-7). The computer automatically assigns any required memory space, IRQ lines, and DMA channels to an installed PCI expansion card during system start-up. The Wakeup On LAN power connector on the riser board supports an optional NIC expansion card with Wakeup On LAN capability. The power LED lights up when DC power is applied to the riser board.
total of five expansion-card slots (see Figure 1-9). Option 2 is an active riser board, with a PCI-to-PCI bridge. Option 2 has two ISA expansion-card connectors 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.
0LQL 7RZHU &RPSXWHU·V ([SDQVLRQ &DUG 6ORWV The OptiPlex GX1/GX1p mini tower computers have seven expansion-card slots. The riser board has four ISA expansion-card connectors and five PCI expansion-card connectors. Two PCI expansion-card connectors share expansion-card slots with two ISA connectors, resulting in a total of seven expansion-card slots (see Figure 1-11). The riser board is active, incorporating PCI-to-PCI bridging.
0DLQ 0HPRU\ ([SDQVLRQ The three DIMM sockets on the system board can accommodate combinations of 32-, 64-, and 128-MB DIMMs up to a total memory capacity of 384 MB. Main memory can have either 72-bit parity (ECC) DIMMs or 64-bit nonparity DIMMs. 9LGHR 0HPRU\ 8SJUDGH 2SWLRQ On the OptiPlex GX1 and OptiPlex NX1 systems, you can upgrade video memory from 4 to 8 MB by installing an optional video-memory upgrade module in the video-memory upgrade socket on the system board.
6\VWHP 'LDJQRVWLFV Server-based and diskette-based diagnostics are available to aid in troubleshooting all major components of the OptiPlex GX1 and GX1p. The OptiPlex NX1 systems use server-based diagnostics, hard-disk–based diagnostics, or the diskette-based diagnostics using an external diskette-drive kit connected directly to the system board. See “Running the System Diagnostics” in Chapter 2 for additional information.
6\VWHP %RDUG -XPSHUV jumpered unjumpered )LJXUH 6\VWHP %RDUG -XPSHUV 7DEOH 6\VWHP %RDUG -XPSHU 'HVFULSWLRQV -XPSHU 'HVFULSWLRQ 6HWWLQJV 500MHZ* Microprocessor speed Install jumper if the microprocessor’s internal speed is 500 MHz; otherwise, the jumper should not be installed. 450MHZ* Microprocessor speed Install jumper if the microprocessor’s internal speed is 450 MHz; otherwise, the jumper should not be installed.
7DEOH 6\VWHP %RDUG -XPSHU 'HVFULSWLRQV FRQWLQXHG -XPSHU 'HVFULSWLRQ 6HWWLQJV 350MHZ* Microprocessor speed Install jumper if the microprocessor’s internal speed is 350 MHz; otherwise, the jumper should not be installed. 333MHZ* Microprocessor speed Install jumper if the microprocessor’s internal speed is 333 MHz; otherwise, the jumper should not be installed. 300MHZ* Microprocessor speed Reserved. Jumper not installed (default).
7DEOH ,QWHUUXSW $VVLJQPHQWV FRQWLQXHG ,54 /LQH 8VHG %\ $YDLODEOH IRQ9 Available for use by an expansion card, except in ACPI-enabled configurations. IRQ10 Available for use by an expansion card. IRQ11* NIC/default PCI IRQ. IRQ12 Generated by keyboard controller to indicate that mouse’s output buffer is full. IRQ13 Generated by math coprocessor to indicate coprocessor error. IRQ14 Generated by device connected to primary EIDE port to indicate that device requires service.
back back left side left side right side right side front OptiPlex NX1 Chassis front Low-Profile Chassis back top right side left side back front bottom Mini Tower Chassis front Midsize Chassis )LJXUH &RPSXWHU 2ULHQWDWLRQ ,QIRUPDWLRQ +DUG 'LVN 'ULYH IRU WKH /RZ 3URILOH &RPSXWHU The hard-disk drive assembly (consisting of the hard-disk drive and the harddisk drive bracket) is located inside the chassis at the left front of the computer and is attached to the bottom of the chassis.
+DUG 'LVN 'ULYH IRU WKH 0LQL 7RZHU &RPSXWHU 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. +DUG 'LVN 'ULYH IRU WKH 2SWL3OH[ 1; &RPSXWHU One 1-inch-high EIDE hard-disk drive can be mounted to the top of the expansion-card cage.
7DEOH 2SWL3OH[ *; *; S '& 9ROWDJH 5DQJHV FRQWLQXHG 9ROWDJH 5DQJH 0D[LPXP 2XWSXW &XUUHQW –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) +5 VFP 3 +4.75 to +5.25 VDC 10 mA 3 VFP (volts flea power) — sometimes called “standby power.
P2, P3, P5, P6, P9 1 2 3 P4 1 4 2 3 4 +12 VDC (yellow) +5 VDC (red) common (black) common (black) common (black) common (black) +5 VDC (red) +12 VDC (yellow) )LJXUH '& 3RZHU &RQQHFWRUV 3 0LGVL]H DQG 0LQL 7RZHU &KDVVLV 3 3 3 3 DQG 3 $OO 2SWL3OH[ *; *; S &KDVVLV P2, P7 1 2 3 4 5 6 +3.3 VDC (blue/white) +3.3 VDC (blue/white) +3.
P1 P2 P4 P3 P5 )LJXUH '& 3RZHU &DEOHV IRU WKH /RZ 3URILOH &RPSXWHU 1-26 Dell OptiPlex GX1/GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual
system board +3 VDC battery P1 PWRGOOD system power supply PSON# +5 VFP +5 VDC –5 VDC +12 VDC –12 VDC P2 +3.3 VDC POWER1 riser board power RTC/ management NVRAM and NIC logic +3.3 VDC +5 VDC +12 VDC –12 VDC RISER PSON# +5 VFP +5 VDC –5 VDC +12 VDC –12 VDC PCI1 PCI2 P1 +5 VDC –5 VDC +12 VDC –12 VDC +5 VDC –5 VDC +12 VDC –12 VDC ISA1 ISA2 POWER2 main memory sockets +12 VDC FAN +5 VFP +5 VDC PANEL DIMM_A optional drive P3 P4 +5 VDC DIMM_B DIMM_C 3.
P1 P6 P4 P5 P7 P9 P3 P2 )LJXUH '& 3RZHU &DEOHV IRU WKH 0LGVL]H DQG 0LQL 7RZHU &RPSXWHUV 1-28 Dell OptiPlex GX1/GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual
system board keyboard controller +3 VDC battery P1 PWRGOOD system power supply PSON# +5 VFP +5 VDC –5 VDC +12 VDC –12 VDC P7 +3.3 VDC internal hard-disk drive P2 internal hard-disk drive P3 3.5-inch diskette drive P4 optional drive P6* * power management RTC/ and NIC logic NVRAM +3.
keyboard controller system board +3 VDC battery P1 PWRGOOD system power supply PSON# +5 VFP +5 VDC –5 VDC +12 VDC –12 VDC P7 +3.3 VDC internal hard-disk drive P2 internal hard-disk drive P3 3.5-inch diskette drive +3.
. 7DEOH 2SWL3OH[ 1; '& 9ROWDJH 5DQJHV 9ROWDJH 5DQJH 0D[LPXP 2XWSXW &XUUHQW1 +3.3 VDC +3.14 to +3.47 VDC 6.0 A1 +5 VDC +4.75 to +5.25 VDC 12.0 A1 +12 VDC +11.40 to +12.60 VDC 1.0 A 2 –12 VDC –10.80 to –13.20 VDC 0.5 A +5 VFP 3 +4.75 to +5.25 VDC 1.2 A 1 The combined load on the +5-VDC and +3.3-VDC outputs should not exceed 65 W. 2 Withstands surges of up to 3.0 A to support disk start-up operations. 3 VFP (volts flea power) — sometimes called “standby power.
P2 1 2 3 4 5 6 +3.3 VDC (blue/white) +3.3 VDC (blue/white) +3.
system board +3 VDC battery power RTC/ management NVRAM and NIC logic P1 POWER_1 PWRGOOD PSON# +5 VFP system power supply PSON# +5 VFP +5 VDC +12 VDC –12 VDC P2 P1 +5 VDC +12 VDC –12 VDC +3.3 VDC +5 VDC +12 VDC –12 VDC POWER_2 RISER +3.3 VDC +5 VDC +12 VDC –12 VDC riser board +3.3 VDC main memory sockets PCI1 +12 VDC FAN +5 VFP +5 VDC PANEL +5 VDC USB DIMM_A internal hard-disk drive P3 DIMM_B DIMM_C +5 VDC +5 VDC MICROPROCESSOR processor core regulator +3.3 VDC core VCC +2.1 to +3.
7HFKQLFDO 6SHFLILFDWLRQV z 7DEOH 7HFKQLFDO 6SHFLILFDWLRQV 0LFURSURFHVVRU Microprocessor type . . . . . . Intel Pentium II microprocessor with MMX technology Microprocessor speed . . . . . 266, 333, 350, 400, or 450 MHz (the GX1p is only available in 400 or 450 MHz) External system clock . . . . . 66/100 MHz Internal cache . . . . . . . . . . . 32-KB (16-KB data cache and 16-KB instruction cache) Math coprocessor . . . . . . . .
7DEOH 7HFKQLFDO 6SHFLILFDWLRQV FRQWLQXHG ([SDQVLRQ %XV FRQWLQXHG ISA expansion-card connectors: Low-profile computers . . . . . . . . . . . Midsize computers . . . . Mini tower computers . . . . . . . . . . . . OptiPlex NX1 computers . . . . . . . . . . .
7DEOH 7HFKQLFDO 6SHFLILFDWLRQV FRQWLQXHG 'ULYHV FRQWLQXHG Mini tower computers . . . . . . . . . . . OptiPlex NX1 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 none Internal hard-disk drive bays: Low-profile computers . . . . . . . . . . . . Midsize computers . . . . Mini tower computers . . . . . . . . . . . . OptiPlex NX1 computers . . . . . . . . . . .
7DEOH 7HFKQLFDO 6SHFLILFDWLRQV FRQWLQXHG 3RUWV Externally accessible: Serial (DTE) . . . . . . . . . . two 9-pin connectors (16550-compatible) Parallel . . . . . . . . . . . . . . one 25-hole connector (bidirectional) Video . . . . . . . . . . . . . . . one 15-hole connector PS/2-style keyboard . . . . 6-pin mini-DIN PS/2-compatible mouse . . . . . . . . . . . . . . 6-pin mini-DIN NIC . . . . . . . . . . . . . . . . . RJ45 connector (optional) USB . . . . . . . . . . . . . . . .
7DEOH 7HFKQLFDO 6SHFLILFDWLRQV FRQWLQXHG &RQWUROV DQG ,QGLFDWRUV Reset control . . . . . . . . . . . . push button Power control. . . . . . . . . . . . push button Power indicator . . . . . . . . . . green LED in normal operation; flashing green LED in sleep state Diskette-drive access indicator . . . . . . . . . . . . . . . . green LED Hard-disk drive access indicator . . . . . . . . . . . . . . . . green LED Link integrity indicator (on systems with NIC connector) . . . . . . . . . . .
7DEOH 7HFKQLFDO 6SHFLILFDWLRQV FRQWLQXHG 3K\VLFDO Low-profile computers: Height . . . . . . . . . . . . . . 10.9 cm (4.3 inches) Width . . . . . . . . . . . . . . . 40.89 cm (16.1 inches) Depth . . . . . . . . . . . . . . . 43.69 cm (17.2 inches) Weight (minimum) . . . . . 10.89 kg (24.0 lb) Midsize computers: Height . . . . . . . . . . . . . . 16.5 cm (6.5 inches) Width . . . . . . . . . . . . . . . 41.9 cm (16.5 inches) Depth . . . . . . . . . . . . . . . 44.5 cm (17.
7DEOH 7HFKQLFDO 6SHFLILFDWLRQV FRQWLQXHG (QYLURQPHQWDO FRQWLQXHG Maximum shock: Operating . . . . . . . . . . . . left side (for low-profile, midsize, and OptiPlex 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 . . . . . . . . . . . . . 27-G faired square wave with a velocity change of 200 inches/sec (508 cm/sec) Altitude: * 1-40 Operating . . . . . . . . . . . .
&+$37(5 %DVLF 7URXEOHVKRRWLQJ This chapter provides basic troubleshooting procedures applicable to all systems of the Dell OptiPlex GX1/GX1p Managed PC and OptiPlex NX1 Net PC families. 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 following procedures in the order they are presented in this manual.
([WHUQDO 9LVXDO ,QVSHFWLRQ The external visual inspection consists of a quick inspection of the exterior of the computer, the monitor, the keyboard, any peripherals, and cables. While performing the visual inspection, make any necessary corrections. To perform the external visual inspection, follow these steps: 1. Turn off the computer, the monitor, and all peripherals. 2. Verify that all power cables are properly connected to the computer, the monitor and peripherals, and their power sources. 3.
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. Proceed to the next section, “Observing the Boot Routine.” 2EVHUYLQJ WKH %RRW 5RXWLQH After you have performed an external visual inspection as described in the previous section, you should boot the system and, while the boot routine is running, observe the system for any indications of problems.
System error messages: These messages can indicate problems or provide status information. If a system error message is displayed, see Table 3-2. Beep codes: A beep code is a series of beeps that indicates an error condition. If the system emits a beep code, see Table 3-1. 5. Observe the monitor screen for the Diagnostics Menu. Does the Diagnostics Menu appear? Yes. See “Running the System Diagnostics” found later in this chapter. No. Proceed to step 6. 6.
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. To reseat a DIMM, remove it from its socket and reinstall it as described in “DIMMs” in Chapter 4, 5, 6, or 7, as appropriate for your system.
6HUYHU %DVHG 'LDJQRVWLFV The server-based diagnostics contains tests that aid in troubleshooting major components of the computer. To run the server-based diagnostics, follow these steps: 1. Turn on all peripherals and the computer. If the system is already on, press to reboot the system. 2. If necessary, enter the System Setup program and set the system to boot from the network. Highlight the Boot Sequence option (see Figure A-1).
Timers Test — Checks the timers used by the microprocessor RTC Test — Confirms the functionality and accuracy of the computer’s RTC PIC Test — Generates an interrupt on each IRQ line to verify interrupt controller operation Speaker Test — Checks the functionality of the speaker by generating tones Video Tests — Verify proper operation of the video controller and the video control circuitry USB1 Tests — Check the USB interface registers and the USB controller Serial Port 1 Tests — Check the
(RAM) required for loading the diagnostics. If a main memory error is detected, a message indicates which DIMM has failed. If no errors are found in main memory, the diagnostics loads and the Diagnostics Menu appears. 3. Observe the monitor screen for the Diagnostics Menu.
kit connected to the computer as shown in Figure 2-1 and described in the following procedure. The diskette-based diagnostics contains the same tests as the hard-disk– based diagnostics. These tests aid in troubleshooting all major components of the system.
5XQQLQJ WKH 'LVNHWWH %DVHG 'LDJQRVWLFV To run the diskette-based diagnostics, follow these steps: 1. Insert a copy of the Dell Diagnostics Diskette into the diskette drive. Turn on all peripherals and the computer. 2. For OptiPlex NX1 systems, enter the System Setup program, set Diskette Drive A to 3.5 Inch, 1.44 MB, and set Primary: under Drives: to Auto (see Figure A-1). Then press to reboot the system.
&+$37(5 %HHS &RGHV DQG (UURU 0HVVDJHV This chapter describes the beep codes and error messages that are common to all members of the Dell OptiPlex GX1/GX1p 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.
7DEOH 3267 %HHS &RGHV 3-2 FRQWLQXHG %HHS &RGH (UURU 3UREDEOH &DXVHV 1-3-1 Main-memory refresh verification failure Faulty or improperly seated 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 first 64 KB of main memory Faulty or improperly seated DIMM 1-3-4 Odd/even logic failure in the first 64 KB of main memory 1-4-1 Address line failure in the first 64 KB of main memory 1-4-2
7DEOH 3267 %HHS &RGHV FRQWLQXHG %HHS &RGH (UURU 3UREDEOH &DXVHV 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 6\VWHP (UURU 0HVVDJHV System error messages typically are presented on the screen duri
7DEOH 6\VWHP (UURU 0HVVDJHV FRQWLQXHG 0HVVDJH 'HILQLWLRQ 3UREDEOH &DXVHV Data error Computer received unrecoverable data-read error from diskette or hard-disk drive. Faulty diskette, diskette drive, or hard-disk drive. Decreasing available memory Read/write failure during POST prevents system from using available memory. One or more DIMMs faulty or improperly seated. Diskette drive 0 seek failure Diskette/tape drive controller could not locate specific sector or track.
7DEOH 6\VWHP (UURU 0HVVDJHV FRQWLQXHG 0HVVDJH 'HILQLWLRQ 3UREDEOH &DXVHV Invalid configuration information please run SETUP program System Setup program contains incorrect system configuration settings. Incorrect configuration settings in System Setup program or faulty battery. Keyboard clock line failure System cannot communicate with keyboard. Keyboard cable connector loose or improperly connected, defective keyboard, or defective keyboard/mouse controller (defective system board).
7DEOH 6\VWHP (UURU 0HVVDJHV 3-6 FRQWLQXHG 0HVVDJH 'HILQLWLRQ 3UREDEOH &DXVHV Memory allocation error Software in use conflicts with operating system, application, or utility. Faulty application or utility. Memory tests terminated by keystroke Memory test did not complete. POST memory test terminated by pressing the spacebar. No boot device available System does not recognize diskette drive or hard-disk drive from which it is trying to boot.
7DEOH 6\VWHP (UURU 0HVVDJHV FRQWLQXHG 0HVVDJH 'HILQLWLRQ 3UREDEOH &DXVHV Seek error MS-DOS unable to locate specific track on diskette or hard-disk drive. Defective diskette or hard-disk drive. Seek operation failed System could not find particular address mark on disk. Faulty diskette or harddisk drive. Shutdown failure System board chip faulty. Defective system board. Time-of-day clock stopped Backup battery low. Defective battery or faulty chip (defective system board).
3-8 Dell OptiPlex GX1/GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual
&+$37(5 5HPRYLQJ DQG 5HSODFLQJ 3DUWV RQ WKH /RZ 3URILOH &KDVVLV 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. Unless otherwise noted, each procedure assumes the following: You have performed the steps in “Precautionary Measures” found later in this chapter.
:$51,1* )25 <285 3(5621$/ 6$)(7< $1' 3527(&7,21 2) 7+( (48,30(17 %HIRUH \RX VWDUW WR ZRUN RQ WKH V\VWHP SHUIRUP WKH IROORZLQJ VWHSV LQ WKH VHTXHQFH OLVWHG 1. Turn off the computer and any attached peripherals. 2. Disconnect the computer and any attached peripherals from their power sources to reduce the potential for personal injury. Also, disconnect any telephone or telecommunication lines from the computer. 3.
diskette drive CD-ROM drive in external bay power supply drive cage for external drive internal harddisk drive chassis intrusion switch expansion-card cage system board )LJXUH ,QWHUQDO 9LHZ RI WKH /RZ 3URILOH &RPSXWHU Removing and Replacing Parts on the Low-Profile Chassis 4-3
&RPSXWHU &RYHU securing buttons (2) front of computer )LJXUH &RPSXWHU &RYHU 5HPRYDO To remove the computer cover, follow these steps: 1. Turn off power to all peripherals, and disconnect the AC power cable from its electrical outlet. 2. Remove the padlock if one is installed. 3. Press in on the two securing buttons until the cover is free to swing up. 4. Raise the back of the cover, and pivot it toward the front of the computer. 5. Lift the cover off of the hooks at the front of the chassis.
(MHFW 3RZHU DQG 5HVHW %XWWRQV eject button computer cover (upside down) reset button power button )LJXUH (MHFW 3RZHU DQG 5HVHW %XWWRQ 5HPRYDO 1. Lay the computer cover upside down on a flat work surface, with the back of the cover facing you. 2. To remove the 3.5-inch diskette-drive eject button, pull gently on the plastic part of the button until it comes free. 3.
)URQW 3DQHO ,QVHUWV computer cover (upside down) 5.25-inch front-panel insert posts (2) ring-tabs (2) )LJXUH )URQW 3DQHO ,QVHUW 5HPRYDO 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. From the front of the cover, use your thumbs to push inward on the insert until it slides off the two posts. To replace a 5.
&RQWURO 3DQHO chassis mounting screw control panel cable control panel mounting tab )LJXUH &RQWURO 3DQHO 5HPRYDO To remove the control panel, follow these steps: 1. Disconnect the control panel cable from the PANEL connector on the system board (see Figure 4-15). 2. From the inside of the chassis, remove the mounting screw holding the control panel to the chassis. 3. Remove the control panel from the chassis.
'ULYHV 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 interface cable 3.5-inch diskette drive DC power cable 5.
,QFK 'LVNHWWH 'ULYH $VVHPEO\ drive-mounting screws (2) 3.5-inch diskette-drive-assembly latches (2) front of computer hooks (2) )LJXUH ,QFK 'LVNHWWH 'ULYH 5HPRYDO To remove the 3.5-inch diskette drive assembly, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of the diskette drive. 2. Press the two 3.5-inch diskette-drive-assembly latches to the left to release the assembly.
,QFK 'ULYH $VVHPEO\ front of computer drive-mounting screws (4) )LJXUH ,QFK 'ULYH $VVHPEO\ 5HPRYDO 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. 3. Lift the 5.25-inch drive assembly straight up and out of the chassis. 4. Lay the 5.25-inch drive assembly upside down; then remove the four screws attaching the drive to the bracket.
+DUG 'LVN 'ULYH $VVHPEO\ hard-disk drive mounting screw holes (4) tabs (2) captive screw notches (2) front of computer )LJXUH +DUG 'LVN 'ULYH $VVHPEO\ 5HPRYDO To remove the hard-disk drive, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of the drive. 2. Loosen the captive screw that secures the hard-disk drive bracket to the chassis. 3. Pivot the hard-disk drive assembly up and lift it out of the chassis. 4.
6\VWHP 3RZHU 6XSSO\ power supply power-supply mounting screw )LJXUH 6\VWHP 3RZHU 6XSSO\ 5HPRYDO 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. Remove the power-supply mounting screw at the back of the chassis. 4. Slide the system power supply forward until it stops; then lift it from the chassis.
([SDQVLRQ &DUGV 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.
([SDQVLRQ &DUG retaining screw expansion card card-mounting bracket expansion-card connector card-slot opening riser board )LJXUH ([SDQVLRQ &DUG 5HPRYDO To remove an expansion card, follow these steps: 1. Disconnect any external cables from the expansion card being removed. 2. Remove the expansion-card cage. 3. Remove the retaining screw from the card-mounting bracket. 4. Grasp the expansion card by its corners, and carefully remove it from the expansion-card connector.
5LVHU %RDUG riser-board mounting screws (2) riser-board alignment slot riser board expansion-card cage )LJXUH 5LVHU %RDUG 5HPRYDO 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. 3. Remove the two riser-board mounting screws. 4. Lift the riser board away from the expansion-card cage.
6\VWHP %RDUG screw slots (5) tabs (5) )LJXUH 6\VWHP %RDUG 5HPRYDO 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. Remove the screw that secures the system board to the bottom of the chassis. 5. Slide the system board toward the front of the chassis until it stops. 6.
6\VWHP %RDUG &RPSRQHQWV The subsections that follow Figure 4-15 contain procedures for removing/ replacing system board components. DIMM sockets (3) telephony (DIMM_A–DIMM_C) connector (TAPI) parallel/serial port 1 connectors (stacked) (PARALLEL/SERIAL1) 3.
',00V To remove a DIMM from one of the three DIMM sockets, follow these steps: 1. Remove the system power supply. 2. Locate the three DIMM sockets (see Figure 4-15). 3. To remove a DIMM, push outward on the DIMM socket’s securing clips until the DIMM is released from its socket. securing clips (2) 2. 1. )LJXUH ',00 5HPRYDO 4. Lift the DIMM away from the socket. 5.
9LGHR 0HPRU\ notch video-memory upgrade socket video-memory upgrade module )LJXUH ,QVWDOOLQJ D 9LGHR 0HPRU\ 8SJUDGH 0RGXOH 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. To install the video memory upgrade, follow these steps: 1.
6. Enter the System Setup program, and confirm that 8 MB is shown in the Video Memory option. If the total memory is listed incorrectly, repeat steps 1 through 6 to reseat the video-memory upgrade module and verify that the computer acknowledges the module. 7. Run the system diagnostics (Video Test Group) to test the new videomemory upgrade module.
To remove the SEC cartridge/heat sink assembly, follow these steps: 1. Remove the system power supply. :$51,1* 7KH 6(& FDUWULGJH KHDW VLQN DVVHPEO\ FDQ JHW H[WUHPHO\ KRW GXULQJ V\VWHP RSHUDWLRQV %H VXUH WKDW WKH DVVHPEO\ KDV KDG VXI ILFLHQW WLPH WR FRRO EHIRUH WRXFKLQJ LW 2. Locate the SEC cartridge/heat sink assembly. 3.
2. Turn off power to all peripherals, and disconnect the AC power cable from its electrical outlet. 3. Remove the computer cover. 4. Remove the expansion-card cage, and locate the battery in the front-right corner of the system board adjacent to the DIMM connectors (see Figure 4-15).
&+$37(5 5HPRYLQJ DQG 5HSODFLQJ 3DUWV RQ WKH 0LGVL]H &KDVVLV This chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex GX1/GX1p 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. Unless otherwise noted, each procedure assumes the following: You have performed the steps in “Precautionary Measures” found later in this chapter.
:$51,1* )25 <285 3(5621$/ 6$)(7< $1' 3527(&7,21 2) 7+( (48,30(17 %HIRUH \RX VWDUW WR ZRUN RQ WKH V\VWHP SHUIRUP WKH IROORZLQJ VWHSV LQ WKH VHTXHQFH OLVWHG 1. Turn off the computer and any attached peripherals. 2. Disconnect the computer and any attached peripherals from their power sources to reduce the potential for personal injury. Also, disconnect any telephone or telecommunication lines from the computer. 3.
3.
2SWLRQDO 6WDQG optional-stand screw )LJXUH 2SWLRQDO 6WDQG 5HPRYDO To remove the optional stand, follow these steps: 1. Place the right side of the computer on a flat work surface. 2. Unscrew the optional-stand screw. Use your fingers or a wide flat-blade screwdriver to unscrew the optionalstand screw. 3. Pull the optional stand away from the computer. Disengage the three orientation nubs that position and help hold the optional stand to the computer.
&RPSXWHU &RYHU securing buttons (2) front of computer )LJXUH &RPSXWHU &RYHU 5HPRYDO To remove the computer cover, follow these steps: 1. Turn off power to all peripherals, and disconnect the AC power cable from its electrical outlet. 2. Press in on the two securing buttons until the cover is free to swing up. 3. Raise the back of the cover, and pivot it toward the front of the computer. 4. Lift the cover off the hooks at the front of the chassis.
(MHFW 3RZHU DQG 5HVHW %XWWRQV computer cover (upside down) eject button reset button power button )LJXUH (MHFW 3RZHU DQG 5HVHW %XWWRQ 5HPRYDO 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. To remove the 3.5-inch diskette-drive eject button, pull gently on the plastic part of the button until it comes free. 3.
)URQW 3DQHO ,QVHUWV computer cover (upside down) 5.25-inch front-panel insert posts (2) ring-tabs (2) )LJXUH )URQW 3DQHO ,QVHUW 5HPRYDO 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. From the front of the cover, use your thumbs to push inward on the insert until it slides off the two posts. To replace a 5.
&RQWURO 3DQHO screw chassis hooks (2) control panel control panel cable )LJXUH &RQWURO 3DQHO 5HPRYDO 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 5-18). 3. Remove the mounting screw holding the control panel to the chassis. 4. Slide the control panel out of the hooks holding it to the chassis.
'ULYHV 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 power supply DC power cable diskette/tape drive interface cable 3.
,QFK 'LVNHWWH 'ULYH $VVHPEO\ bracket-mounting screw drive-mounting screws (2) hooks (2) front of computer )LJXUH ,QFK 'LVNHWWH 'ULYH 5HPRYDO 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. Remove the bracket-mounting screw. 3. Rotate the left side of the 3.5-inch diskette drive assembly up, and lift the assembly out of the chassis. 4.
,QFK 'ULYH $VVHPEO\ retaining tabs (2) )LJXUH ,QFK 'ULYH $VVHPEO\ 5HPRYDO To remove a 5.25-inch drive assembly from the middle or lower drive bay, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of the drive. 2. Press in on the two retaining tabs (one on each side of the drive), and slide the drive assembly forward to remove it. 3. Remove the four screws attaching the 5.
+DUG 'LVN 'ULYH %UDFNHW lower-back tab hard-disk drive bracket handle screw )LJXUH +DUG 'LVN 'ULYH %UDFNHW 5HPRYDO To remove the hard-disk drive bracket, follow these steps. &$87,21 7KH YLGHR PHPRU\ PRGXOH FDQ EH GDPDJHG ZKHQ WKH KDUG GLVN GULYH EUDFNHW LV UHPRYHG LI WKH KDUG GLVN GULYH·V '& SRZHU FDEOH DQG WKH LQWHUIDFH FDEOH DUH QRW GLVFRQQHFWHG ILUVW 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.
+DUG 'LVN 'ULYH drive-mounting screws (4) for bottom-mounted drive drive-mounting screws (4) for side-mounted drive hard-disk drive bracket hard-disk drive )LJXUH +DUG 'LVN 'ULYH 5HPRYDO To remove the hard-disk drive, follow these steps: 1. Remove the hard-disk drive bracket. 2. Remove the four screws that attach the hard-disk drive to the hard-disk drive bracket. One hard-disk drive attaches to the hard-disk drive bracket at the sides of the drive.
6\VWHP 3RZHU 6XSSO\ power supply DC power cables securing tab slot )LJXUH 6\VWHP 3RZHU 6XSSO\ 5HPRYDO 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—>,” and rotate it to the right until it stops. Press the securing tab to the left to release the power supply. 3. Disconnect the DC power cables from the system board and the drives. 4.
([SDQVLRQ &DUGV 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. ([SDQVLRQ &DUG &DJH lever expansioncard cage notch )LJXUH ([SDQVLRQ &DUG &DJH 5HPRYDO To remove an expansion-card cage, follow these steps: 1.
([SDQVLRQ &DUG expansion card expansion-card connector retaining screw card-mounting bracket card-slot opening riser board )LJXUH ([SDQVLRQ &DUG 5HPRYDO To remove an expansion card, follow these steps: 1. Disconnect any cables from the expansion card being removed. 2. Remove the expansion-card cage. 3. Remove the retaining screw from the card-mounting bracket. 4. Grasp the expansion card by its corners, and carefully remove it from the expansion-card connector.
5LVHU %RDUG riser-board mounting screws (2) slots (2) riser board expansion-card cage )LJXUH 5LVHU %RDUG 5HPRYDO To remove the riser board, follow these steps: 1. Remove the expansion-card cage and all expansion cards. 2. On a flat work surface, turn the expansion-card cage over, with the riser board facing up. 3. Remove the riser-board mounting screws. 4. Slide the riser board down until it stops; then lift the riser board away from the expansion-card cage.
6\VWHP %RDUG screw slots (5) tabs (5) )LJXUH 6\VWHP %RDUG 5HPRYDO 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. Remove the screw that secures the system board to the bottom of the chassis. 5. Slide the system board toward the front of the chassis until it stops. 6.
6\VWHP %RDUG &RPSRQHQWV The subsections that follow Figure 5-18 contain procedures for removing/ replacing system board components. DIMM sockets (3) telephony (DIMM_A–DIMM_C) connector (TAPI) parallel/serial port 1 connectors (stacked) (PARALLEL/SERIAL1) 3.
',00V To remove a DIMM from one of the three DIMM sockets, follow these steps: 1. Remove the system power supply. 2. Locate the three DIMM sockets (see Figure 5-18). 3. To remove a DIMM, push outward on the DIMM socket’s securing clips until the DIMM is released from its socket. securing clips (2) 2. 1. )LJXUH ',00 5HPRYDO 4. Lift the DIMM away from the socket. 5.
9LGHR 0HPRU\ notch video-memory upgrade socket video-memory upgrade module )LJXUH ,QVWDOOLQJ D 9LGHR 0HPRU\ 8SJUDGH 0RGXOH 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. To install the video memory upgrade, follow these steps: 1.
6. Enter the System Setup program, and confirm that 8 MB is shown in the Video Memory option. If the total memory is listed incorrectly, repeat steps 1 through 6 to reseat the video-memory upgrade module and verify that the computer acknowledges the module. 7. Run the system diagnostics (Video Test Group) to test the new videomemory upgrade module.
To remove the SEC cartridge/heat sink assembly, follow these steps: 1. Remove the system power supply. :$51,1* 7KH 6(& FDUWULGJH KHDW VLQN DVVHPEO\ FDQ JHW H[WUHPHO\ KRW GXULQJ V\VWHP RSHUDWLRQV %H VXUH WKDW WKH DVVHPEO\ KDV KDG VXI ILFLHQW WLPH WR FRRO EHIRUH WRXFKLQJ LW 2. Locate the SEC cartridge/heat sink assembly. 3.
2. Turn off power to all peripherals, and disconnect the AC power cable from its electrical outlet. 3. Remove the computer cover. 4. Remove the expansion-card cage, and locate the battery in the front-right corner of the system board adjacent to the DIMM connectors (see Figure 5-18).
&+$37(5 5HPRYLQJ DQG 5HSODFLQJ 3DUWV RQ WKH 0LQL 7RZHU &KDVVLV This chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex GX1/GX1p mini tower computers. 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. Unless otherwise noted, each procedure assumes the following: You have performed the steps in “Precautionary Measures” found later in this chapter.
:$51,1* )25 <285 3(5621$/ 6$)(7< $1' 3527(&7,21 2) 7+( (48,30(17 %HIRUH \RX VWDUW WR ZRUN RQ WKH V\VWHP SHUIRUP WKH IROORZLQJ VWHSV LQ WKH VHTXHQFH OLVWHG 1. Turn off the computer and any attached peripherals. 2. Disconnect the computer and any attached peripherals from their power sources to reduce the potential for personal injury. Also, disconnect any telephone or telecommunication lines from the computer. 3.
power supply external drive bays hard-disk drive bracket expansion-card cage system board riser board )LJXUH ,QWHUQDO 9LHZ RI WKH 0LQL 7RZHU &RPSXWHU Removing and Replacing Parts on the Mini Tower Chassis 6-3
&RPSXWHU &RYHU release button )LJXUH &RPSXWHU &RYHU 5HPRYDO To remove the computer cover, follow these steps: 1. Turn off power to all peripherals, and disconnect the AC power cable from its electrical outlet. 2. Remove the padlock if one is installed. 3. Facing the left side of the computer, press the release button at the bottom-left corner of the front bezel. 4. Lift the bottom of the cover, allowing it to pivot up toward you. 5.
)URQW %H]HO tab release retaining hooks (2) )LJXUH )URQW %H]HO 5HPRYDO To remove the front bezel, follow these steps: 1. Press the tab release marked with the icon. 2. Tilt the bezel away from the chassis. 3. Disengage the two retaining hooks at the bottom of the bezel, and pull the bezel away from the chassis.
(MHFW 3RZHU DQG 5HVHW %XWWRQV front bezel eject button power button reset button )LJXUH (MHFW 3RZHU DQG 5HVHW %XWWRQ 5HPRYDO To remove the eject, power, and reset buttons, follow these steps: 1. Lay the front bezel on a flat work surface, with the back of the bezel facing up. 2. To remove the 3.5-inch diskette-drive eject button, pull gently on the plastic part of the button until it comes free. 3.
)URQW 3DQHO ,QVHUWV front bezel posts (2) 5.25-inch front-panel insert ring-tabs (2) )LJXUH ,QFK )URQW 3DQHO ,QVHUW 5HPRYDO To remove a 5.25-inch front-panel insert, follow these steps: 1. Hold the bezel with the front facing you. 2. From the front of the bezel, use your thumbs to press inward on the insert until it slides off the two posts. To replace a 5.
eject button mechanism back of bezel front of bezel )LJXUH ,QFK )URQW 3DQHO ,QVHUW 5HPRYDO To remove a 3.5-inch front-panel insert, follow these steps: 1. Hold the bezel with the front facing you. 2. Inside the bezel, press the eject button mechanism toward the front panel to snap the plastic insert out of its opening. 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.
&RQWURO 3DQHO chassis hooks (2) control panel control panel cable screw )LJXUH &RQWURO 3DQHO 5HPRYDO 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 6-20). 3. Remove the mounting screw holding the control panel to the chassis. 4. Slide the control panel out of the hooks holding it to the chassis.
'ULYHV 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 interface cable 3.
,QFK 'LVNHWWH 'ULYH $VVHPEO\ retaining-tab release button )LJXUH ,QFK 'LVNHWWH 'ULYH $VVHPEO\ 5HPRYDO To remove a 3.5-inch diskette drive assembly, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of the 3.5-inch diskette drive. 2. Press the retaining-tab release button, and pull the drive assembly forward to remove it. 3. Remove the drive-mounting screw from the left side of the drive, and remove the drive from the bracket (see Figure 6-10).
drive-mounting screw hooks (2) )LJXUH ,QFK 'LVNHWWH 'ULYH %UDFNHW 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.
To remove a 5.25-inch drive assembly from the middle or lower drive bay, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of the drive. 2. Press in on the two retaining tabs (one on each side of the drive), and slide the drive assembly forward to remove it. 3. Remove the four screws attaching the 5.25-inch drive to the mounting plate, and lift the drive out of the mounting plate (see Figure 6-12).
+DUG 'LVN 'ULYH %UDFNHW drive-cage slide rail chassis slot hinge tabs (3) sliding tab )LJXUH +DUG 'LVN 'ULYH %UDFNHW 5HPRYDO 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. Remove the screw that secures the hard-disk drive bracket to the drive cage in the chassis. 3.
+DUG 'LVN 'ULYH drive-mounting screws (4) for side-mounted drive sliding tab hard-disk drive hard-disk drive bracket drive-mounting screws (4) for bottom-mounted drive )LJXUH +DUG 'LVN 'ULYH 5HPRYDO To remove the hard-disk drive assembly, follow these steps: 1. Remove the hard-disk drive bracket. 2. Remove the four screws that attach the hard-disk drive to the hard-disk drive bracket. One hard-disk drive attaches to the hard-disk drive bracket at the sides of the drive.
6\VWHP 3RZHU 6XSSO\ power supply DC power cables slot power-supply detent link securing tab )LJXUH 6\VWHP 3RZHU 6XSSO\ 5HPRYDO To remove the system power supply, follow these steps: 1. Disconnect the AC power cable from the back of the system power supply. 2. Free the system power supply from the securing tab labeled “RELEASE—>,” and rotate it upward until it locks. Press the securing tab to release the power supply. 3. Disconnect the DC power cables from the system board and the drives. 4.
([SDQVLRQ &DUGV 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.
([SDQVLRQ &DUG expansion card retaining screw card-slot opening card-mounting bracket riser board expansion-card connector )LJXUH ([SDQVLRQ &DUG 5HPRYDO To remove an expansion card, follow these steps: 1. Disconnect any cables from the expansion card being removed. 2. Remove the expansion-card cage. 3. Remove the retaining screw from the card-mounting bracket. 4. Grasp the expansion card by its corners, and carefully remove it from the expansion-card connector.
5LVHU %RDUG riser-board mounting screws (2) riser board slots (2) expansion-card cage )LJXUH 5LVHU %RDUG 5HPRYDO To remove the riser board, follow these steps: 1. Remove the expansion-card cage and all expansion cards. 2. Place the expansion-card cage on a flat work surface with the riser board facing up. 3. Remove the riser-board mounting screws. 4. Slide the riser board away from the release handle until it stops; then lift the riser board away from the expansion-card cage.
6\VWHP %RDUG screw slots (5) tabs (5) )LJXUH 6\VWHP %RDUG 5HPRYDO 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. Remove the screw that secures the system board to the bottom of the chassis. 5. Slide the system board toward the front of the chassis until it stops. 6.
6\VWHP %RDUG &RPSRQHQWV The subsections that follow Figure 6-20 contain procedures for removing/ replacing system board components. DIMM sockets (3) telephony (DIMM_A–DIMM_C) connector (TAPI) parallel/serial port 1 connectors (stacked) (PARALLEL/SERIAL1) 3.
',00V To remove a DIMM from one of the three DIMM sockets, follow these steps: 1. Remove the system power supply. 2. Locate the three DIMM sockets (see Figure 6-20). 3. To remove a DIMM, push outward on the DIMM socket’s securing clips until the DIMM is released from its socket. securing clips (2) 2. 1. )LJXUH ',00 5HPRYDO 4. Lift the DIMM away from the socket. 5.
9LGHR 0HPRU\ notch video-memory upgrade socket video-memory upgrade module )LJXUH ,QVWDOOLQJ D 9LGHR 0HPRU\ 8SJUDGH 0RGXOH 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. To install the video memory upgrade, follow these steps: 1.
6. Enter the System Setup program, and confirm that 8 MB is shown in the Video Memory option. If the total memory is listed incorrectly, repeat steps 1 through 6 to reseat the video-memory upgrade module and verify that the computer acknowledges the module. 7. Run the system diagnostics (Video Test Group) to test the new videomemory upgrade module.
To remove the SEC cartridge/heat sink assembly, follow these steps: 1. Remove the system power supply. :$51,1* 7KH 6(& FDUWULGJH KHDW VLQN DVVHPEO\ FDQ JHW H[WUHPHO\ KRW GXULQJ V\VWHP RSHUDWLRQV %H VXUH WKDW WKH DVVHPEO\ KDV KDG VXI ILFLHQW WLPH WR FRRO EHIRUH WRXFKLQJ LW 2. Locate the SEC cartridge/heat sink assembly. 3.
2. Turn off power to all peripherals, and disconnect the AC power cable from its electrical outlet. 3. Remove the computer cover. 4. Remove the expansion-card cage, and locate the battery in the front-right corner of the system board adjacent to the DIMM connectors (see Figure 6-20).
&+$37(5 5HPRYLQJ DQG 5HSODFLQJ 3DUWV RQ WKH 2SWL3OH[ 1; 1HW 3& &KDVVLV This chapter provides procedures for removing the components, assemblies, and subassemblies in the Dell OptiPlex NX1 Net PC computer. If you are servicing a low-profile, midsize, or mini tower chassis, use Chapter 4, 5, or 6, as appropriate for your system. Unless otherwise noted, each procedure assumes the following: You have performed the steps in “Precautionary Measures” found later in this chapter.
3UHFDXWLRQDU\ 0HDVXUHV 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. :$51,1* )25 <285 3(5621$/ 6$)(7< $1' 3527(&7,21 2) 7+( (48,30(17 %HIRUH \RX VWDUW WR ZRUN RQ WKH V\VWHP SHUIRUP WKH IROORZLQJ VWHSV LQ WKH VHTXHQFH OLVWHG 1. Turn off the computer and any attached peripherals. 2.
power supply system board hard-disk drive expansion-card cage )LJXUH ,QWHUQDO 9LHZ RI WKH 2SWL3OH[ 1; &RPSXWHU 2SWLRQDO 6WDQG captive screw locator pins (2) (on underside of stand) front bezel )LJXUH 2SWLRQDO 6WDQG 5HPRYDO To remove the optional stand, if one is installed, follow these steps: 1. Place the right side of the computer on a flat work surface. 2. Unscrew the captive screw using your fingers or a wide flat-blade screwdriver.
3. Pull the optional stand away from the computer. 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. The locator pins are keyed for correct installation.
To remove the computer cover, follow these steps: 1. Remove the padlock, if one is installed, from the padlock ring. security cable slot padlock ring service access lock )LJXUH 6HUYLFH $FFHVV /RFN 2. Using a #2 Phillips screwdriver, rotate the service access lock 1/4-turn clockwise to the position shown in Figure 7-4. 3. Press the two securing buttons until the cover is free to swing up. 4. Raise the back of the cover, and pivot it toward the front of the computer. 5.
&RQWURO 3DQHO cable retention tabs (2) mounting screw control panel cable chassis tabs (3) )LJXUH &RQWURO 3DQHO 5HPRYDO To remove the control panel, follow these steps: 1. Remove the power supply. 2. Disconnect the control panel cable from the PANEL connector on the system board (see Figure 7-12). 3. From inside the chassis, remove the mounting screw securing the control panel to the chassis. 4. Remove the control panel from the chassis.
+DUG 'LVN 'ULYH hard-disk drive expansion-card cage hard-disk drive mounting screws (4) )LJXUH +DUG 'LVN 'ULYH 5HPRYDO To remove a hard-disk drive, follow these steps: 1. Disconnect the DC power cable and the EIDE cable from the back of the drive. 2. Disconnect any external cables from the expansion card if one is installed. 3. Remove the expansion-card cage. 4. Remove the expansion card, if one is installed. 5.
6\VWHP 3RZHU 6XSSO\ power supply systemboard DC power cables (2) EIDE cable power-supply retention tab hard-disk drive DC power cable cable tabs (2) chassis tabs (2) AC power receptacle screw )LJXUH 6\VWHP 3RZHU 6XSSO\ 5HPRYDO To remove the system power supply, follow these steps: 1. Disconnect the AC power cable from the back of the computer. 2. Disconnect the DC power cables from the system board and the hard-disk drive. 3. Remove the expansion-card cage. 4.
([SDQVLRQ &DUG &DJH 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 DC power cable securing lever slots (2) tabs (2) )LJXUH ([SDQVLRQ &DUG &DJH 5HPRYDO To remove the expansion-card cage, follow these steps: 1.
([SDQVLRQ &DUG card-slot opening expansion-card connector riser board card mounting bracket retaining screw expansion card )LJXUH ([SDQVLRQ &DUG 5HPRYDO To remove the expansion card, follow these steps: 1. Disconnect any external cables from the expansion card. 2. Remove the expansion-card cage. 3. Remove the retaining screw from the card-mounting bracket. 4. Grasp the expansion card by its corners, and carefully remove it from the expansion-card connector.
5LVHU %RDUG expansion-card cage tabs (2) riser board slots (2) riser-board mounting screw )LJXUH 5LVHU %RDUG 5HPRYDO To remove the riser board, follow these steps: 1. Remove the expansion-card cage. 2. Remove the expansion card if one is installed. 3. Lay the expansion-card cage on a flat work surface, with the riser board facing up. 4. Remove the riser-board mounting screw. 5. Slide the riser board to the side as shown in Figure 7-10, and then remove the riser board from the expansion-card cage.
6\VWHP %RDUG system board back of computer screw slots (5) tabs (5) )LJXUH 6\VWHP %RDUG 5HPRYDO &$87,21 'R QRW XVH WKH PLFURSURFHVVRU KHDW VLQN DV D KDQGOH ZKHQ UHPRYLQJ RU LQVWDOOLQJ WKH V\VWHP ERDUG 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. Remove the screw that secures the system board to the bottom of the chassis. 5.
6\VWHP %RDUG &RPSRQHQWV The subsections that follow Figure 7-12 contain procedures for removing system board components. DIMM sockets (3) telephony (DIMM_A–DIMM_C) connector (TAPI) parallel/serial port 1 connectors (stacked) (PARALLEL/SERIAL1) 3.
',00V To remove a DIMM from one of the three DIMM sockets, follow these steps: 1. Locate the three DIMM sockets (see Figure 7-12). 2. To remove a DIMM, push outward on the DIMM socket’s securing clips until the DIMM is released from its socket. securing clips (2) 2. 1. )LJXUH ',00 5HPRYDO 3. Lift the DIMM away from the socket. 4. Reinstall the replacement DIMM by pressing the DIMM fully into the socket while closing the securing clips to lock the DIMM into the socket. 2. securing clips (2) 1.
9LGHR 0HPRU\ notch video-memory upgrade socket video-memory upgrade module )LJXUH ,QVWDOOLQJ D 9LGHR 0HPRU\ 8SJUDGH 0RGXOH 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. To install the video memory upgrade, follow these steps: 1.
6. Enter the System Setup program, and confirm that 8 MB is shown in the Video Memory option. If the total memory is listed incorrectly, repeat steps 1 through 6 to reseat the video-memory upgrade module and verify that the computer acknowledges the module. 7. Run the system diagnostics (Video Test Group) to test the new video-memory upgrade module.
To remove the SEC cartridge/heat sink assembly, follow these steps: 1. Remove the system power supply. :$51,1* 7KH 6(& FDUWULGJH KHDW VLQN DVVHPEO\ FDQ JHW H[WUHPHO\ KRW GXULQJ V\VWHP RSHUDWLRQV %H VXUH WKDW WKH DVVHPEO\ KDV KDG VXI ILFLHQW WLPH WR FRRO EHIRUH WRXFKLQJ LW 2. Locate the SEC cartridge/heat sink assembly. 3.
2. Turn off power to all peripherals, and disconnect the AC power cable from its electrical outlet. 3. Remove the computer cover. 4. Remove the expansion-card cage, and locate the battery in the front-right corner of the system board adjacent to the DIMM connectors (see Figure 7-12).
$33(1',; $ 6\VWHP 6HWXS 3URJUDP This appendix, which applies to all Dell OptiPlex GX1/GX1p Managed PC and OptiPlex 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. To enter the System Setup program, follow these steps: 1. Turn on (or reboot) the system. 2. Press when the Dell logo screen appears.
6\VWHP 6HWXS 6FUHHQV title box configuration options help Dell Computer Corporation (www.dell.com) Page 1 of 2 Time: 13:17:02 System OptiPlex GX1 400M Setup Date: Mon April 1, 1998 BIOS Version: XXX This category sets the time in 24-hour format (hours:minutes: seconds) for the internal clock/ calendar. Diskette Drive A: 3.5 inch, 1.
7DEOH $ 6\VWHP 6HWXS 2SWLRQV 2SWLRQ )XQFWLRQ Time Resets time on computer’s internal clock. Date Resets date on computer’s internal calendar. Diskette Drive A Diskette Drive B Identifies type of diskette drives installed. Option choices always match physical locations of drives in computer. Tape drives are not reflected in these options. NOTE: For OptiPlex NX1 chassis, a single diskette drive can be used for service purposes only.
7DEOH $ 6\VWHP 6HWXS 2SWLRQV FRQWLQXHG 2SWLRQ )XQFWLRQ Chassis Intrusion Enables or disables the chassis intrusion feature. If computer cover is removed when the option is set to Enabled, the setting changes 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 press any key. This action changes the setting from Detected to Enabled.
7DEOH $ 6\VWHP 6HWXS 2SWLRQV FRQWLQXHG 2SWLRQ )XQFWLRQ Auto Power On Allows you to set the day and time you want the system to power on automatically. The time uses the 24-hour format. Power Management With the Power Management option enabled, DPMS monitors and most EIDE drives automatically switch into low-power mode during periods of system inactivity.
7DEOH $ 6\VWHP 6HWXS 2SWLRQV FRQWLQXHG 2SWLRQ )XQFWLRQ Microprocessor Displays type of microprocessor installed. Level 2 Cache Displays size of level-2 cache memory installed. System Memory Displays entire amount of installed memory detected in system, except for memory on EMS expansion cards. Video Memory Displays amount of video memory on the system board. Service Tag Displays system’s five-character service tag number.
When determining the order of devices to boot from, the system first considers the order of the devices listed under the Device Controller Priority option, then the order of devices under Boot Device Priority. To specify your priority preferences, order the devices under these categories so that the highest-priority controller is at the top of the Device Controller Priority option and the highest-priority device is at the top of the Boot Device Priority option.
A-8 Dell OptiPlex GX1/GX1p Managed PC and OptiPlex NX1 Net PC Systems Service Manual
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