HP ProDesk 600 G4 Base Model Small Form Factor PC Instrukcja Użytkownika Strona 90
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Power LED ashes Red ve times, once every second, followed by a two second pause, and the computer beeps ve times. (Beeps stop
after fth iteration but LEDs continue ashing.)
Cause Solution
Memory is installed incorrectly or is bad. 1. Reseat DIMMs. Power on the system.
2. Replace DIMMs one at a time to isolate the faulty module.
3. Replace third-party memory with HP memory.
4. Replace the system board.
Solving USB ash drive problems
If you encounter USB ash drive problems, common causes and solutions are listed in the following table.
USB ash drive is not seen as a drive letter in Windows.
Cause Solution
The drive letter after the last physical drive is not available. Change the default drive letter for the ash drive in Windows.
USB ash drive not found (identied).
Cause Solution
The device is attached to a USB port that has been hidden in
Computer Setup.
Run the Computer Setup utility and enable USB ports in Advanced >
Port Options.
The device was not properly seated before power-up. Ensure the device is fully inserted into the USB port before applying
power to the system
System will not boot from USB ash drive.
Cause Solution
Boot order is not correct. Run the Computer Setup utility and change boot sequence in
Advanced > Boot Options.
Removable Media Boot is disabled in the Computer Setup utility. Run the Computer Setup utility and enable booting to removable
media in Advanced > Boot Options. Ensure USB is enabled in
Storage > Boot Order.
The computer boots to DOS after making a bootable ash drive.
Cause Solution
Flash drive is bootable. Install the ash drive only after the operating system boots.
Flash drive is defective. Try a dierent ash drive.
82 Chapter 6 Troubleshooting without diagnostics
- 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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