HP ZBook 17 G5 Mobile Workstation User Manual Page 114
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- 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 7-2 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.
Next step: If the computer experiences a power-on issue, see “Verify Power Good (Troubleshooting) lights” in
No Power on page 120.
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 105 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)
102 Chapter 7 Troubleshooting guide
- Maintenance and Service Guide 1
- Safety warning notice 5
- Table of contents 7
- 1 Product description 13
- 2 Components 21
- 10 Chapter 2 Components 22
- Right 11 23
- 12 Chapter 2 Components 24
- Display 13 25
- Keyboard area 26
- Keyboard area 15 27
- 16 Chapter 2 Components 28
- Keyboard area 17 29
- 18 Chapter 2 Components 30
- Special keys 31
- Action keys 32
- Keyboard area 21 33
- To use a hot key: 34
- 22 Chapter 2 Components 34
- Bottom 23 35
- 24 Chapter 2 Components 36
- Component Description 37
- Labels 27 39
- 3 Illustrated parts catalog 40
- Computer major components 29 41
- Computer major components 31 43
- Miscellaneous parts 47
- Tools required 48
- Service considerations 48
- Cables and connectors 49
- Drive handling 49
- Grounding guidelines 50
- Workstation guidelines 51
- Equipment guidelines 52
- Customer Self-Repair parts 53
- Description Spare part number 55
- Hard drive (HDD) 56
- Solid-state drive (SSD) 58
- ODD L31315-001 60
- Memory modules 63
- SIM card 65
- WWAN module 66
- Keyboard 68
- 7. Remove the keyboard (4) 71
- Middle cover 73
- Fingerprint reader assembly 75
- Smart card board 77
- NFC module 79
- TouchPad click board 80
- Right fan, GPU L30389-001 82
- Left fan, CPU L30389-001 82
- System board 84
- Heat sink 86
- Discrete MXM daughter card 89
- Power button board 93
- RTC battery 95
- Display assembly 101
- Display assembly components 103
- Top cover 111
- 7 Troubleshooting guide 112
- Resources 113
- General troubleshooting steps 113
- Identify the issue 114
- 2. Examine the environment 116
- Analyze the issue 117
- Table 7-5 Boot-error codes 123
- Resolve the issue 125
- 13. Replace the system board 129
- Helpful Hints 130
- During operation 131
- Consulting with HP Service 131
- Power-on issues 132
- AC adapter issue 135
- Battery discharges too fast 137
- Burnt smell 137
- No video (with power) 138
- Blinking lights 139
- Diagnostics error messages 139
- Performance (OS) 141
- Intermittent shutdown 142
- Blue screen 143
- No wake up 147
- Unresponsive 148
- Slow performance 148
- Incorrect time and date 149
- Display anomalies 150
- Dead pixel 151
- Vertical lines 151
- Horizontal lines 151
- No video (internal) 152
- No video (external) 153
- DisplayPort/VGA 153
- Touch screen 155
- I/O devices 156
- Keyboard point stick 157
- Keyboard backlight 157
- TouchPad 158
- Smart card reader 162
- Thunderbolt (TB) 164
- Read-write error 167
- Blue screen (BSOD) error 167
- Noisy hard drive 168
- Mechanical 169
- Noise (sound) 170
- Fan runs constantly 171
- Thermal shutdown (hot) 172
- Stuck power button 172
- Additional information 173
- Processor not executing code 174
- Memory module error 174
- Failure - System Board Error 175
- Additional information 165 177
- Error message list 178
- Bug check symbolic names 178
- Use Windows Debugging Tool 179
- 6. Open the crash dump le 182
- Lookup for Bug Check 0xC2 183
- Additional information 171 183
- Cable management 185
- Connector types 186
- Using Computer Setup 189
- Updating the BIOS 190
- Downloading a BIOS update 191
- Using Windows tools 194
- Restore and recovery 195
- 11 Specications 200
- Nonvolatile memory usage 206
- Nonvolatile memory usage 195 207
- Questions and answers 208
- 14 Recycling 210
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