HP ProDesk 600 G4 Base Model Small Form Factor PC Manual de usuario Pagina 102
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1. Shut down the operating system properly, then turn o the computer and any external devices, and
disconnect the power cord from the power outlet.
2. With the power cord disconnected, press the power button again to drain the system of any residual power.
WARNING! To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to
disconnect the power cord from the wall outlet, and allow the internal system components to cool before
touching.
CAUTION: When the computer is plugged in, the power supply always has voltage applied to the system
board even when the unit is turned o. Failure to disconnect the power cord can result in damage to
the system.
Static electricity can damage the electronic components of the computer or optional equipment. Before
beginning these procedures, ensure that you are discharged of static electricity by briey touching a
grounded metal object. See the Safety & Regulatory Information guide for more information.
3. Remove the access panel.
4. Locate the header and jumper labeled CMOS/PSWD.
NOTE: The password jumper is blue so that it can be easily identied.
5. Remove the jumper from pins 1 and 2.
6. Place the jumper on either pin 1 or 2, but not both, so that it does not get lost.
7. Replace the access panel and reconnect the external equipment.
8. Plug in the computer and turn on power. Allow the operating system to start. This clears the current
passwords and disables the password features.
9. Shut down the computer, unplug the power, and disconnect the external equipment.
10. Remove the access panel.
11. Place the jumper on pins 1 and 2.
12. Replace the access panel.
13. Reconnect the external equipment and plug in the computer.
94 Chapter 8 Password security and resetting CMOS
- Maintenance and Service Guide 1
- About This Book 3
- Table of contents 5
- 1 Product features 9
- Front panel components 10
- Rear panel components 11
- 2 Illustrated parts catalog 12
- Computer major components 5 13
- Miscellaneous parts 14
- Miscellaneous parts 7 15
- Miscellaneous parts 9 17
- Miscellaneous parts 11 19
- Miscellaneous parts 13 21
- Miscellaneous parts 15 23
- Miscellaneous parts 17 25
- Miscellaneous parts 19 27
- Miscellaneous parts 21 29
- Generating static 30
- Grounding the work area 31
- Operating guidelines 32
- Routine care 33
- Service considerations 34
- SMART ATA drives 35
- Preparation for disassembly 36
- Access panel 37
- Optical drive 38
- Front bezel 39
- Hard drives 40
- Drive cage 42
- Memory module 43
- Power supply 45
- Fan shroud 46
- Fan-sink 47
- Processor 48
- Serial connector module 50
- System board 51
- 6. Remove the lower cage (2) 52
- System board 45 53
- Connector board 54
- Computer Setup–Main 57
- Computer Setup—Security 59
- Computer Setup—Advanced 61
- Safety and comfort 67
- Helpful hints 68
- Solving general problems 69
- Solving general problems 63 71
- Solving power problems 72
- Solving hard drive problems 73
- Solving display problems 76
- Solving display problems 69 77
- Solving display problems 71 79
- Solving audio problems 80
- Solving audio problems 73 81
- Solving printer problems 82
- Solving network problems 86
- Solving network problems 79 87
- Solving memory problems 89
- Solving software problems 92
- 10 System backup and recovery 106
- Using Windows tools 108
- Restore and recovery 108
- A Battery replacement 111
- Current BIOS steps 114
- Nonvolatile memory usage 116
- Nonvolatile memory usage 109 117
- Questions and answers 118
- Using HP Sure Start 119
- C Power cord set requirements 120
- Country-specic requirements 121
- D Specications 122
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