HP ZBook Studio G4 Base Model Mobile Workstation User Manual Page 90
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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These lights should be visible after removing the service door or bottom
cover. Consult with support for platform-specic locations of the lights.
●
Example: System board is good. Lights that turn on briey (< 1 second) and immediately turn o indicate
normal function. In this case, system (3.3V), power good (3.3V), and system reset (3.3V) are all good and
troubleshooting lights should not be lit. However, other external lights should be lit as normal
afterward.
Troubleshooting lights External lights Action Note
O On Do not replace system board No power-on issue
On O Replace board Power-on issue
●
Example: System board needs replacement. When (1) system 3.3V exists, but one power rail is bad then
(2) power good is low (0V), and troubleshooting lights will turn on.
After you press the system power button, troubleshooting lights will turn on for 5 seconds and turn
o. The system external lights will not light up. Follow general troubleshooting steps (i.e., remove
recently added hardware, test with minimum conguration, etc.) prior to replacing the system board.
Resolve the issue
8. Hard reset
A hard reset or forced reset (http://support.hp.com/us-en/document/c01684768) erases all information in
the computer's memory and may restore functionality. Resetting the computer forces the system to clear and
reestablish the connections between the BIOS and the hardware.
IMPORTANT: Battery removal is NOT necessary for a hard reset on G3 or G4 mobile workstations. Follow the
instructions for a computer with a non-removable battery.
78 Chapter 6 Troubleshooting guide
- 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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