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C–10 437963-001 Service Reference Guide, dc5750
POST Error Messages
Red Power LED
flashes six times,
once every
second, followed
by a two second
pause. Beeps stop
after fifth iteration
but LEDs continue
until problem is
solved.
6Pre-video
graphics error.
For systems with a graphics card:
1. R e s e a t t h e g r a p h i c s c a r d.
2. Replace the graphics card.
3. Replace the system board.
For systems with integrated graphics,
replace the system board.
Red Power LED
flashes seven
times, once every
second, followed
by a two second
pause. Beeps stop
after fifth iteration
but LEDs continue
until problem is
solved.
7 System board
failure (ROM
detected failure
prior to video).
Replace the system board.
Red Power LED
flashes eight times,
once every
second, followed
by a two second
pause. Beeps stop
after fifth iteration
but LEDs continue
until problem is
solved.
8Invalid ROM
based on bad
checksum.
1. Reflash the ROM with the latest BIOS
image. See the “Boot Block
Emergency Recovery Mode” section of
the Desktop Management Guide on
the Documentation and Diagnostics
CD.
2. Replace the system board.
POST Diagnostic Front Panel LEDs and Audible Codes (Continued)
Activity Beeps Possible Cause Recommended Action
- HP Compaq dc5750 Business PC 1
- 1st Edition 1
- Service Reference Guide 3
- First Edition (November 2006) 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
- 3.4 ROM Flash 35
- Remote ROM Flash 36
- Software Manager at 36
- 3.4.2 HPQFlash 37
- 3.4.4 Replicating the Setup 38
- Copying to Multiple Computers 39
- Creating a Bootable Device 40
- 3.4.5 Dual-State Power Button 42
- 3.4.6 HP Web Site Support 43
- 3.4.7 Industry Standards 43
- 3.5.1 Password Security 46
- Entering a Power-On Password 47
- Entering a Setup Password 47
- 3.5.4 DriveLock 49
- Using DriveLock 50
- DriveLock Applications 50
- 3.5.5 Smart Cover Sensor 51
- 3.5.6 Cable Lock Provision 52
- 3.6.3 Thermal Sensor 53
- 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 Microtower (MT) 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
- 6.6 Cable Management 76
- 6.6.1 Cable Connections 77
- 6.7 Memory 78
- 6.8 Expansion Cards 79
- 6.9 Drives 83
- Releasing the Drives 85
- 6.10 Chassis Fan 93
- 6.11 Front Shroud 94
- 6.13 Heatsink 96
- 6.14 Processor 97
- 6.15 Speaker 99
- 6.16 Power Supply 100
- 6.17 System Board 101
- 6.18 Battery 102
- 6.18.1 Type 1 Battery Holder 103
- 6.18.2 Type 2 Battery Holder 104
- 6.18.3 Type 3 Battery Holder 105
- 7.2.2 Padlo ck 108
- 7.2.1 Cable Lock 108
- 7.3 A cces s Panel 109
- 7.4 Fron t B ezel 110
- 7.5 Front D rive B ezels 111
- 7.6 Cable Management 112
- 7.6.1 Cable Connections 113
- 7.7 Dr ives 114
- 7.7.2 O pti cal Drive 115
- 7.7.4 H ard Drive 120
- 7.8 Mem or y 123
- 7.9 Expansion Card 125
- 7.10 Power Supply 127
- 7.11 Fan Shroud 128
- 7.12 Front I/O Device 129
- 7.13 Chassis Fan 130
- 7.15 Spea ke r 133
- 7.16 Heatsi nk 134
- 7.17 P rocessor 135
- 7.18 Sys tem B oard 137
- 7.19 Bat t er y 138
- 7.19.1 Type 1 Battery Holder 139
- Connector Pin Assignments 143
- Ethernet RJ-45 144
- Ethernet AUI 144
- Parallel Interface 144
- Microphone 145
- Headphone 145
- Line-In Audio 145
- Line-Out Audio 146
- External Infrared Transceiver 146
- PCI Express 150
- DVI Connector 152
- Power Cord Set Requirements 153
- Country-Specific Requirements 154
- POST Error Messages 155
- Preliminary Checklist 167
- Solving Minor Problems 168
- Solving Power Supply Problems 171
- Solving Diskette Problems 173
- Solving Hard Drive Problems 175
- Never remove the card when 178
- Solving Display Problems 179
- Ensure the computer power is 182
- Solving Audio Problems 183
- Solving Printer Problems 185
- Solving Network Problems 191
- Solving Memory Problems 194
- Solving Processor Problems 195
- Solving Drive Key Problems 198
- Solving Software Problems 202
- Designators 203
- DDR2-SDRAM DIMMs 207
- DIMM Sockets 207
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