HP ZBook Studio G4 Base Model Mobile Workstation User Manual Page 77
- Page / 182
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Table 6-1 Troubleshooting methodology and general troubleshooting steps
Identify issue Analyze issue Resolve issue Verify solution
12. Test with veried working
conguration (hardware and/or operating
system) on page 82
13. Replace the system board on page 82
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 Description
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.
Next step: If the computer experiences a power-on issue, see “Verify Power Good (Troubleshooting) lights” in
No Power on page 85.
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 68 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.
General troubleshooting steps 65
- Maintenance and Service Guide 1
- Safety warning notice 5
- Table of contents 7
- 1 Product description 13
- 2 Components 17
- 6 Chapter 2 Components 18
- Display 7 19
- Keyboard area 20
- Keyboard area 9 21
- 10 Chapter 2 Components 22
- Special keys 23
- Action keys 24
- Bottom 13 25
- 14 Chapter 2 Components 26
- Component 27
- (2) Product number 27
- (3) Serial number 27
- (4) Warranty period 27
- 3 Illustrated parts catalog 28
- Computer major components 17 29
- Computer major components 19 31
- Bracket Kit 33
- Plastics Kit 34
- Miscellaneous parts 34
- Miscellaneous parts 23 35
- Tools required 36
- Service considerations 36
- Grounding guidelines 37
- Bottom cover 41
- Solid-state drive (M.2) 43
- WLAN module 45
- Memory module 47
- RTC battery 49
- Thermal module 50
- Description Spare part number 53
- Fingerprint reader board 54
- LED board 55
- Display cable 57
- System board 58
- I/O support bracket 61
- Speakers 62
- Keyboard 63
- 4. Remove the keyboard (2) 64
- Display assembly 65
- Top cover 74
- 6 Troubleshooting guide 75
- Resources 76
- General troubleshooting steps 76
- Identify the issue 77
- 2. Examine the environment 79
- Analyze the issue 80
- Resolve the issue 90
- 13. Replace the system board 94
- Helpful Hints 95
- Consulting with HP Service 96
- Power-on issues 97
- AC adapter issue 100
- Battery discharges too fast 102
- Burnt smell 103
- No video (with power) 103
- Blinking lights 104
- Diagnostics error messages 105
- Performance (OS) 106
- Intermittent shutdown 107
- Blue screen 108
- No wake up 112
- Unresponsive 113
- Slow performance 113
- Incorrect time and date 114
- Display anomalies 115
- Dead pixel 117
- No video (internal) 117
- No video (external) 118
- DisplayPort/VGA 118
- Touch screen 120
- I/O devices 121
- Keyboard point stick 122
- Keyboard backlight 122
- TouchPad 123
- Smart card reader 127
- Thunderbolt (TB) 129
- Thunderbolt 3 dock 130
- Read-write error 133
- Blue screen (BSOD) error 133
- Noisy hard drive 134
- Mechanical 135
- Noise (sound) 136
- Fan runs constantly 137
- Thermal shutdown (hot) 138
- Additional information 139
- Processor not executing code 140
- Memory module error 141
- Failure - System Board Error 141
- Additional information 131 143
- Error message list 144
- Bug check symbolic names 144
- Use Windows Debugging Tool 145
- 6. Open the crash dump le 148
- Lookup for Bug Check 0xC2 149
- Additional information 137 149
- Cable management 151
- Connector types 152
- Using Computer Setup 154
- Updating the BIOS 155
- Downloading a BIOS update 156
- Using Windows tools 161
- Restore and recovery 162
- 10 Specications 166
- Nonvolatile memory usage 171
- Questions and answers 173
- 13 Recycling 178
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