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Dell OptiPlex GX110 Service Manual - Page 71

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MS-DOS unable to locate specific track on diskette or hard-disk drive. System could not find particular address mark on disk. System board chip faulty. Backup battery low. Time or date setting in System Setup program incorrect or system battery bad. Timer circuit on system board malfunctioning. Defective diskette or hard-disk drive. Faulty diskette or harddisk drive. Defective system board. Defective battery or faulty chip (defective system board). Incorrect Time or Date settings or defective system battery. Defective system board. Keyboard/mouse controller malfunctioning or one or more DIMMs improperly seated. MS-DOS cannot write to diskette or hard-disk drive. Improperly seated DIMMs or faulty keyboard/mouse controller chip (defective system board). Faulty diskette or harddisk drive. Beep Codes and Error Messages 3-7

Section	Page
Dell OptiPlex GX1 and NX1 Service Manual	1
Contents	3
System Overview	13
Chassis Differences	14
Chassis Similarities	15
Standard Features	15
Pentium II Microprocessor	15
Secondary L2 Cache	15
Main Memory	15
Upgradable BIOS in Flash Memory	16
EIDE Subsystem	16
SMART Technology	16
Integrated Diskette/Tape Drive Controller	16
Integrated SVGA Subsystem	17
Integrated Audio Controller	17
ATI Multimedia Channel	17
Telephony Application Programming Interface	18
Chassis Intrusion Detection	18
Integrated Ethernet NIC Support (Optional)	18
Network Cable Requirements	19
Full Set of I/O Ports	19
UPS	19
Location of Major Components	19
Advanced Expansion Features	24
OptiPlex NX1 Computer’s Expansion-Card Slot	25
Low-Profile Computer’s Expansion-Card Slots	25
Midsize Computer’s Expansion-Card Slots	25
Mini Tower Computer’s Expansion-Card Slots	27
Upgrade Options	27
Microprocessor/L2 Cache Upgrades	27
Main Memory Expansion	28
Video-Memory Upgrade Option	28
Computer Service Information	28
Remote Management Support Features (Optional)	28
Online Documentation	28
System Diagnostics	29
System-Board Service Data	29
System Board	29
System Board Jumpers	30
Interrupt Assignments	31
DMA Channel Assignments	32
Hard-Disk Drive Service Information	32
Hard-Disk Drive for the Low-Profile Computer	33
Hard-Disk Drive for the Midsize Computer	33
Hard-Disk Drive for the Mini Tower Computer	34
Hard-Disk Drive for the OptiPlex NX1 Computer	34
Power-Supply Service Data	34
Pin Assignments for the DC Power Connectors	35
DC Power Distribution	36
System Power Supply for the OptiPlex NX1 Computer	41
OptiPlex NX1 Pin Assignments for the DC Power Connectors	42
DC Power Distribution for the OptiPlex NX1 Computer	43
Technical Specifications	45
Basic Troubleshooting	53
Initial User Contact	53
External Visual Inspection	54
Observing the Boot Routine	55
Internal Visual Inspection	56
Eliminating Resource Conflicts	57
Running the System Diagnostics	58
Server-Based Diagnostics	58
Hard-Disk–Based Diagnostics (OptiPlex NX1 Systems Only)	59
Diskette-Based Diagnostics	61
Connecting an External Diskette Drive to the OptiPlex NX1 Computer	61
Running the Diskette-Based Diagnostics	62
Getting Help	63
Beep Codes and Error Messages	65
POST Beep Codes	65
System Error Messages	67
Removing and Replacing Parts on the Low-Profile Chassis	73
Recommended Tools	73
Precautionary Measures	73
Inside the Computer	74
Computer Cover	75
Eject, Power, and Reset Buttons	76
Front-Panel Inserts	77
Control Panel	78
Drives	79
Externally Accessible Drive Assemblies	79
3.5-Inch Diskette Drive Assembly	80
5.25-Inch Drive Assembly	81
Hard-Disk Drive Assembly	82
System Power Supply	83
Expansion Cards	84
Expansion-Card Cage	84
Expansion Card	85
Riser Board	86
System Board	87
System Board Components	88
DIMMs	89
Video Memory	90
Microprocessor	91
SEC Cartridge/Heat Sink Assembly	91
System Battery	92
Removing and Replacing Parts on the Midsize Chassis	95
Recommended Tools	95
Precautionary Measures	95
Inside the Computer	96
Optional Stand	98
Computer Cover	99
Eject, Power, and Reset Buttons	100
Front-Panel Inserts	101
Control Panel	102
Drives	103
Externally Accessible Drive Assemblies	103
3.5-Inch Diskette Drive Assembly	104
5.25-Inch Drive Assembly	105
Hard-Disk Drive Bracket	106
Hard-Disk Drive	107
System Power Supply	108
Expansion Cards	109
Expansion-Card Cage	109
Expansion Card	110
Riser Board	111
System Board	112
System Board Components	113
DIMMs	114
Video Memory	115
Microprocessor	116
SEC Cartridge/Heat Sink Assembly	116
System Battery	117
Removing and Replacing Parts on the Mini Tower Chassis	119
Recommended Tools	119
Precautionary Measures	119
Inside the Computer	120
Computer Cover	122
Front Bezel	123
Eject, Power, and Reset Buttons	124
Front-Panel Inserts	125
Control Panel	127
Drives	128
Externally Accessible Drive Assemblies	128
3.5-Inch Diskette Drive Assembly	129
5.25-Inch Drive Assembly	130
Hard-Disk Drive Bracket	132
Hard-Disk Drive	133
System Power Supply	134
Expansion Cards	135
Expansion-Card Cage	135
Expansion Card	136
Riser Board	137
System Board	138
System Board Components	139
DIMMs	140
Video Memory	141
Microprocessor	142
SEC Cartridge/Heat Sink Assembly	142
System Battery	143
Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis	145
Recommended Tools	145
Precautionary Measures	145
Inside the Computer	146
Optional Stand	147
Computer Cover	148
Control Panel	150
Hard-Disk Drive	151
System Power Supply	152
Expansion-Card Cage	153
Expansion Card	154
Riser Board	155
System Board	156
System Board Components	157
DIMMs	158
Video Memory	159
Microprocessor	160
SEC Cartridge/Heat Sink Assembly	160
System Battery	161
System Setup Program	163
System Setup Screens	164
Device List	169