HP ZBook Studio G5 Mobile Workstation User Manual Page 91
- Page / 192
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Identify the issue
1. Understand the issue
It is important to understand the issue that occurred, including related symptoms. It helps to understand the
basic computer boot-up sequence as well as the failure itself. The boot-up sequence and associated failures
are described below.
Boot up sequence
The computer performs several steps after you press the power button or restart the computer.
It is important to understand where in the boot-up sequence the symptoms occur. The following table lists
the phases of the boot-up sequence and explains the symptoms that may occur in each phase. For example, a
blue screen error (BSOD) often occurs during the performance phase.
Table 6-2 Boot-up sequence
Item Procedure
Power-on After power button is pressed, the computer boots after all internal power rails (i.e., 5V, 3.3V) are stable.
Conrm that power lights are on fan is spinning.
Common issues: all lights are o; troubleshooting lights are on; does not boot; video is absent.
POST (UEFI/BIOS) Power-On Self-Test (POST) veries that hardware components (processor, hard drive, memory, etc.) are
functional. When POST is complete, the HP logo displays briey and then disappears.
If there are errors, the computer may exhibit blinking lights and POST error messages
Common issues: lights blink, error message appears, hangs.
Performance
(operating system)
System boots to operating system, and Windows logo screen appears.
Common issues: hangs (lock up/freezes), blue screen, video distorted, driver conict, slow performance,
display issue (dead pixel), I/O issue (no speaker sound), wireless/audio unavailable, noise.
See Analyze the issue on page 82 table below for detailed troubleshooting information).
Failure classication
Failure classication is a breakdown of dierent types of failures and symptoms that could occur during the
boot-up sequence. Table 3 and table 4 represent the failure classication for common notebook failures.
Table 3 categorizes failures by the boot-up sequence.
1. Power-on: Common issues are No Power, Recycle/Reboot, etc.
2. POST: Common issues are No Boot (have power), Light Flash or Diagnostics Error.
3. Performance: Common issues are Intermittent Loss of Power, Blue Screen, Hang, etc. In many cases,
issues may be identied and associated with a particular hardware (i.e., display, storage).
Table 4 categorizes failures by hardware.
4. Display
5. I/O devices (Input/Output)
6. Storage
7. Mechanical
General troubleshooting steps 79
- Maintenance and Service Guide 1
- Safety warning notice 3
- Table of contents 5
- 1 Product description 13
- 2 Components 18
- 8 Chapter 2 Components 20
- Display 9 21
- Keyboard area 22
- Keyboard area 11 23
- 12 Chapter 2 Components 24
- Special keys 25
- Action keys 26
- Keyboard area 15 27
- 16 Chapter 2 Components 28
- 3 Illustrated parts catalog 30
- Computer major components 19 31
- Computer major components 21 33
- Plastics Kit 34
- Mass storage devices 37
- Bracket Kit 39
- Miscellaneous parts 40
- Tools required 41
- Service considerations 41
- Drive handling 42
- Workstation guidelines 43
- Equipment guidelines 44
- Bottom cover 45
- Description Spare part number 47
- Solid-state drive (M.2) 49
- Optane memory module 51
- Memory module 52
- WWAN modules 56
- WLAN/Bluetooth combo card 58
- Hard drive connector 60
- Fingerprint reader board 61
- NFC module 64
- Bottom speakers 65
- 4. Remove the speaker (4) 66
- Card reader/audio board 67
- Thermal module 68
- Discrete graphics models: 70
- UMA graphics models: 70
- System board 71
- RTC battery 75
- Power button board 76
- Top speaker 78
- Display assembly 79
- Top cover/keyboard 88
- 6 Troubleshooting guide 89
- Resources 90
- General troubleshooting steps 90
- Identify the issue 91
- 2. Examine the environment 93
- Analyze the issue 94
- Table 6-5 Boot-error codes 100
- Resolve the issue 101
- 13. Replace the system board 104
- Helpful Hints 105
- During operation 106
- Consulting with HP Service 107
- Power-on issues 107
- AC adapter issue 110
- Battery discharges too fast 112
- Burnt smell 112
- No video (with power) 113
- Blinking lights 114
- Diagnostics error messages 114
- Performance (OS) 116
- Intermittent shutdown 117
- Blue screen 118
- No wake up 122
- Unresponsive 123
- Slow performance 123
- Display anomalies 124
- Dead pixel 127
- No video (internal) 127
- No video (external) 128
- DisplayPort/VGA 128
- Touch screen 130
- I/O devices 131
- Keyboard point stick 132
- Keyboard backlight 132
- TouchPad 133
- Smart card reader 136
- Thunderbolt (TB) 138
- Read-write error 141
- Blue screen (BSOD) error 141
- Noisy hard drive 142
- Mechanical 143
- Noise (sound) 144
- Fan runs constantly 145
- Thermal shutdown (hot) 146
- Stuck power button 146
- Additional information 147
- Processor not executing code 148
- Memory module error 148
- Failure - System Board Error 149
- Additional information 139 151
- Error message list 152
- Bug check symbolic names 152
- Use Windows Debugging Tool 153
- 6. Open the crash dump le 156
- Lookup for Bug Check 0xC2 157
- Additional information 145 157
- Cable management 159
- Connector types 160
- Using Computer Setup 162
- Updating the BIOS 163
- Downloading a BIOS update 164
- Using Windows tools 171
- Before you begin 172
- Creating the recovery media 172
- Restoring and recovery 173
- 10 Specications 176
- Nonvolatile memory usage 181
- Questions and answers 183
- 13 Recycling 188
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