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Service Reference Guide, dc7700 433612-001 5–7
Identifying the Chassis, Routine Care, and Disassembly Preparation
■ Cleaning under a key may be done with a swab moistened with isopropyl alcohol and
squeezed out. Be careful not to wipe away lubricants necessary for proper key functions. Use
tweezers to remove any fibers or dirt in confined areas. Allow the parts to air dry before
reassembly.
5.4.4 Cleaning the Monitor
■ Wipe the monitor screen with a clean cloth moistened with water or with a towelette
designed for cleaning monitors. Do not use sprays or aerosols directly on the screen; the
liquid may seep into the housing and damage a component. Never use solvents or flammable
liquids on the monitor.
■ To clean the monitor body follow the procedures in Section 5.4.2.
5.4.5 Cleaning the Mouse
Before cleaning the mouse, ensure that the power to the computer is turned off.
■ Clean the mouse ball by first removing the retaining plate and the ball from the housing. Pull
out any debris from the ball socket and wipe the ball with a clean, dry cloth before
reassembly.
■ To clean the mouse body, follow the procedures in Section 5.4.2.
5.5 Service Considerations
Listed below are some of the considerations that you should keep in mind during the disassembly
and assembly of the computer.
5.5.1 Power Supply Fan
The power supply fan is a variable-speed fan based on the temperature in the power supply.
Ä
CAUTION: The cooling fan is always on when the computer is in the “On” mode. The cooling fan is off
when the computer is in “Standby,” “Suspend,” or “Off” modes.
You must disconnect the power cord from the power source before opening the computer to prevent
system board or component damage.
5.5.2 Tools and Software Requirements
To service the computer, you need the following:
■ Torx T-15 screwdriver (HP screwdriver with bits, PN 161946-001)
■ Torx T-15 screwdriver with small diameter shank (for certain front bezel removal)
■ Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)
■ Phillips #2 screwdriver
■ Diagnostics software
■ HP tamper-resistant T-15 wrench (Smart Cover FailSafe Key, PN 166527-001) or
HP tamper-resistant bits (Smart Cover FailSafe Key, PN 166527-002)
- HP Compaq dc7700 Business PC 1
- 1st Edition 1
- Service Reference Guide 3
- Contents 10
- 2.1 Power-On Self-Test (POST) 13
- 2.2 Computer Setup Utilities 14
- 2.2.2 Computer Setup Menu 16
- 2.3 HP Insight Diagnostics 26
- 2.3.2 Survey Tab 27
- 2.3.3 Test Tab 28
- 2.3.4 Status Tab 29
- 2.3.5 Log Tab 29
- 2.3.6 Help Tab 29
- Enter key 30
- Desktop Management 31
- 3.1.1 HP OpenView Agent 32
- 3.3.3 HP Client Manager 34
- 3.3.5 HP Client Premium Suite 35
- Technology 37
- 3.4 ROM Flash 39
- 3.4.2 HPQFlash 40
- 3.4.4 Replicating the Setup 41
- Copying to Multiple Computers 42
- Creating a Bootable Device 43
- 3.4.5 Dual-State Power Button 45
- 3.4.6 HP Web Site Support 46
- 3.4.7 Industry Standards 46
- 3.5.1 Password Security 49
- Entering a Power-On Password 50
- Entering a Setup Password 50
- 3.5.4 DriveLock 52
- Using DriveLock 53
- DriveLock Applications 53
- 3.5.5 Smart Cover Sensor 54
- 3.5.6 Cable Lock Provision 55
- 3.6.3 Thermal Sensor 56
- Features 57
- 4.2 SATA Hard Drive Cables 58
- 4.3 PATA Device Information 59
- 4.4 ATA SMART Drives 59
- 4.5 Hard Drive Capacities 59
- Disassembly Preparation 61
- 5.2.1 Generating Static 63
- 5.2.4 Grounding the Work Area 64
- 5.3 Operating Guidelines 65
- 5.4 Routine Care 66
- 5.5 Service Considerations 67
- 5.5.3 Screws 68
- 5.5.4 Cables and Connectors 68
- 5.5.5 Hard Drives 68
- 6.3 Hood Sensor 73
- 6.4 External Security Devices 74
- 6.5 Computer Access Panel 75
- 6.6 Front Bezel 76
- 6.7 Front Drive Bezels 77
- 6.8 Cable Management 79
- 6.8.1 Cable Connections 80
- 6.9 Memory 81
- 6.10 Expansion Cards 82
- 6.11 PCI Retainer Latch 86
- 6.12 Expansion Card Guide 88
- 6.13 Drives 89
- 6.13.2 Hard Drive 90
- 6.13.3 Optical Drive 92
- 6.13.4 Diskette Drive 95
- 6.14 Front I/O Device 96
- 6.15 Power Switch Assembly 97
- 6.16 System Board 98
- 6.17 Battery 99
- 6.17.1 Type 1 Battery Holder 100
- 6.17.2 Type 2 Battery Holder 101
- 6.17.3 Type 3 Battery Holder 102
- 6.18 Heatsink 103
- 6.19 Processor 104
- 6.20 Speaker 105
- 6.21 Chassis Fan 106
- 6.22 Power Supply 107
- ■ Power outage 116
- ■ Startup failure 116
- ■ Lost password 116
- 7.3 Hood Sensor 118
- 7.4.1 Security Clip 119
- 7.4.2 Cable Lock 119
- 7.4.3 Padlock 120
- 7.5 Computer Cover 121
- 7.6 Front Dr ive Bezels 122
- Item Description 123
- 1 Diskette drive bezel 123
- 2 Hard drive bezel 123
- 3 3.5” drive bezel 123
- 7.7 Cable Management 124
- 7.7.1 Cable Connections 125
- 7.8 M e m or y 126
- 7.9.2 PCI Expansion Card 128
- 7.11 Drives 136
- 7.11.2 Optical Drive 137
- 7.12 Fan Shroud 144
- 7.13 Front I/O D evi ces 145
- 7.14 Hea ts ink 146
- 7.15 P ro cesso r 147
- 7.16 S p eaker 149
- 7.17 Power Supply 150
- 7.18 C h a s s is Fan 152
- 7.19 System Board 153
- 7.20 Drive Clutch Components 156
- 7.21 Power Switch Assembly 158
- 7.22 B a t ter y 159
- 7.22.3 Type 3 Battery Holder 162
- 8.2 External Security Devices 165
- 8.3 Computer Access Panel 166
- 8.4 Optical Drive 167
- 8.5 Front Panel Assembly 169
- 8.6 Front Bezel 170
- 8.7 Chassis Fan 171
- 8.8 Speaker 172
- 8.9 Cable Management 173
- 8.9.1 Cable Connections 174
- 8.10 Memory 175
- 8.11 Expansion Card Cage 176
- 8.12 Expansion Card 177
- 8.14 Hard Drive 180
- 8.15 Front I/O Device 182
- 8.16 Heatsink Assembly 183
- 8.17 Processor 184
- 8.18 Power Supply 186
- 8.19 System Board 187
- 8.20 Battery 188
- 8.20.1 Type 1 Battery Holder 189
- 8.20.2 Type 2 Battery Holder 190
- 8.20.3 Type 3 Battery Holder 191
- Connector Pin Assignments 193
- Ethernet RJ-45 194
- Ethernet AUI 194
- Parallel Interface 194
- Microphone 195
- Headphone 195
- Line-In Audio 195
- Line-Out Audio 196
- External Infrared Transceiver 196
- CD-ROM 50-Pin Connector 197
- PCI Express 200
- DVI Connector 202
- Power Cord Set Requirements 203
- Country-Specific Requirements 204
- POST Error Messages 205
- Preliminary Checklist 219
- Solving Minor Problems 220
- Solving Power Supply Problems 223
- Solving Diskette Problems 225
- Solving Hard Drive Problems 227
- Never remove the card when 230
- Solving Display Problems 231
- Ensure the computer power is 234
- Solving Audio Problems 235
- Solving Printer Problems 237
- Solving Network Problems 242
- Solving Memory Problems 245
- Solving Processor Problems 246
- Solving Drive Key Problems 249
- Solving Software Problems 253
- Designators 255
- DIMM Sockets 259
- DDR2-SDRAM DIMMs 259
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