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6–32 433611-001 Service Reference Guide, dx7300
Removal and Replacement Procedures— Microtower (MT) Chassis
6.17 Power Supply
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WARNING: Voltage is always present on the system board when the computer is plugged into an
active AC outlet. To avoid possible personal injury and damage to the equipment the power cord should
be disconnected from the computer and/or the AC outlet before opening the computer.
1. Prepare the computer for disassembly (Section 6.1).
2. Remove the access panel and rotate the computer so the system board is parallel to the table
to make it easier to work on (Section 6.3).
3. Disconnect all power cables from the mass storage devices and from the system board.
4. Remove the screws that connect the power supply to the chassis 1.
- HP Compaq dx7300 Business PC 1
- 1st Edition 1
- Service Reference Guide 3
- HP Compaq dx7300 Business PC 4
- Contents 5
- 2.1 Power-On Self-Test (POST) 11
- 2.2 Computer Setup Utilities 12
- 2.2.2 Computer Setup Menu 14
- 2.3 HP Insight Diagnostics 24
- 2.3.2 Survey Tab 25
- 2.3.3 Test Tab 26
- 2.3.4 Status Tab 27
- 2.3.5 Log Tab 27
- 2.3.6 Help Tab 27
- Enter key 28
- Desktop Management 29
- 3.1.1 HP OpenView Agent 30
- 3.3.3 HP Client Manager 32
- 3.3.5 HP Client Premium Suite 33
- Technology 35
- 3.4 ROM Flash 37
- 3.4.2 HPQFlash 38
- 3.4.4 Replicating the Setup 39
- Copying to Multiple Computers 40
- Creating a Bootable Device 41
- 3.4.5 Dual-State Power Button 43
- 3.4.6 HP Web Site Support 44
- 3.4.7 Industry Standards 44
- 3.5.1 Password Security 47
- Entering a Power-On Password 48
- Entering a Setup Password 48
- 3.5.4 DriveLock 50
- Using DriveLock 51
- DriveLock Applications 51
- 3.5.5 Smart Cover Sensor 52
- 3.5.6 Cable Lock Provision 53
- 3.6.1 Drive Protection System 54
- 3.6.3 Thermal Sensor 54
- Features 55
- 4.2 SATA Hard Drive Cables 56
- 4.3 PATA Device Information 57
- 4.4 ATA SMART Drives 57
- 4.5 Hard Drive Capacities 57
- Disassembly Preparation 59
- 5.1.2 Slim Tower (ST) 60
- 5.2.1 Generating Static 61
- 5.2.4 Grounding the Work Area 62
- 5.3 Operating Guidelines 63
- 5.4 Routine Care 63
- 5.4.3 Cleaning the Keyboard 64
- 5.5 Service Considerations 65
- 5.5.3 Screws 66
- 5.5.4 Cables and Connectors 66
- 5.5.5 Hard Drives 66
- Microtower (MT) Chassis 69
- 6.2 External Security Devices 70
- 6.2.2 Installing a Padlock 71
- 6.3 Access Panel 72
- 6.4 Front Bezel 73
- To reinstall the front bezel: 74
- 6.5 Front Drive Bezels 75
- 6.5.2 Diskette Drive Bezel 76
- 6.6 Cable Management 77
- 6.6.1 Cable Connections 78
- 6.7 Memory 79
- 6.8 Expansion Cards 81
- 6.9 Drives 85
- 6.9.2 Removing a Drive 86
- Releasing the Drives 87
- 6.9.3 Installing a Drive 88
- 6.10 Chassis Fan 91
- 6.12 Front I/O Devices 93
- 6.13 Power Switch Assembly 94
- 6.14 Heatsink 95
- 6.15 Processor 97
- 6.16 Speaker 99
- 6.17 Power Supply 100
- 6.18 System Board 102
- 6.19 Battery 103
- 6.19.1 Type 1 Battery Holder 104
- 6.19.2 Type 2 Battery Holder 105
- 6.19.3 Type 3 Battery Holder 106
- Slim Tower (ST) Chassis 107
- ■ Power outage 109
- ■ Startup failure 109
- ■ Lost password 109
- 7.3 Hood Sensor 111
- 7.4.1 Security Clip 112
- 7.4.2 Cable Lock 112
- 7.4.3 Padlock 113
- 7.5 Computer Cover 114
- 7.6 Fron t Drive B e zel s 115
- Item Description 116
- 1 Diskette drive bezel 116
- 2 Hard drive bezel 116
- 3 3.5” drive bezel 116
- 7.7 Cable Management 117
- 7.7.1 Cable Connections 118
- 7.8 Mem o r y 119
- 7.9.2 PCI Expansion Card 121
- 7.11 Dr ives 130
- 7.11.2 Optical Drive 131
- 7.12 Fa n Shro u d 139
- 7.13 Front I/O Devi c es 140
- 7.14 H e a t sin k 141
- 7.15 Proc es s or 142
- 7.16 S pea ker 144
- 7.17 Power Supply 145
- 7.18 C ha s sis Fan 147
- 7.19 System Board 148
- 7.20 Drive Clutch Components 151
- 7.21 Power Switch Assembly 153
- 7.22 B a t ter y 154
- 7.22.3 Type 3 Battery Holder 157
- Connector Pin Assignments 159
- Ethernet RJ-45 160
- Ethernet AUI 160
- Parallel Interface 160
- Microphone 161
- Headphone 161
- Line-In Audio 161
- Line-Out Audio 162
- External Infrared Transceiver 162
- CD-ROM 50-Pin Connector 163
- PCI Express 166
- DVI Connector 168
- Power Cord Set Requirements 169
- Country-Specific Requirements 170
- POST Error Messages 171
- Preliminary Checklist 185
- Solving Minor Problems 186
- Solving Power Supply Problems 189
- Solving Diskette Problems 191
- Solving Hard Drive Problems 193
- Never remove the card when 196
- Solving Display Problems 197
- Ensure the computer power is 200
- Solving Audio Problems 201
- Solving Printer Problems 203
- Solving Network Problems 208
- Solving Memory Problems 211
- Solving Processor Problems 212
- Solving Drive Key Problems 215
- Solving Software Problems 219
- Designators 221
- DDR2-SDRAM DIMMs 225
- DIMM Sockets 225
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