HP ZBook Studio x360 Maintenance and Service Guide - Page 90

Failure classification by hardware devices and mechanical, 2. Examine the environment, Failure

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Failure classification by hardware devices and mechanical Table 6-4 Failure classification by hardware devices and mechanical 4. Display 5. I/O devices 6. Storage 7. Mechanical 1. Display anomalies on page 109 2. Dead pixel on page 112 1. Keyboard on page 116 2. Keyboard point stick on page 117 3. No video (internal) on page 112d 3. Keyboard backlight on page 117 4. No video (external) on page 113d 5. DisplayPort/VGA on page 113 4. TouchPad on page 118 5. Network Connectivity Ethernet (RJ-45 jack) on page 118 6. HDMI on page 113 6. Network connectivity 7. No or bad external video via docking on page 114 wireless (WLAN) on page 119 7. USB on page 120 8. Incorrect or missing color/ distorted image 8. Smart card reader on page 114 on page 121 1. Hard drive/solid-state drive not recognized on page 125 2. No boot to operating system (no read/write error) on page 125 3. Read-write error on page 126 4. Slow performance on page 108c 5. Blue screen (BSOD) error on page 126b 6. Noisy hard drive on page 127 9. Touch screen on page 115 9. Speaker, headphone audio issues on page 122 10. Thunderbolt (TB) on page 123 1. Fan error message - 90B on page 128 2. Noise (sound) on page 129 3. Fan runs constantly on page 130 4. HP Thermal Monitor on page 83 5. Stuck power button on page 131 b,c,d similar symptoms 2. Examine the environment It is important to examine the computer's environment. If you can quickly identify the cause of the issue, fewer resolution steps may be needed. Perform the following environment inspections: ● Check all cables and connections to be sure that there are no loose connections. ● Confirm that power sources are good, such as wall power type/adapter (110V/220V ac), power strip. Test with a verified working AC outlet. ● Check for compatibility issues between the computer and third-party devices, peripherals, noncertified devices, incompatible hardware (i.e., Mac OS device). Incompatibility can result in blue screen errors, improper operation, and so on. ● Isolate the computer from sources of electromagnetic interference (EMI), such as cell phones, 2-way radios, floor mats, fans (and other electronic motors). EMI may contribute to a display freeze issue or lock-up. 78 Chapter 6 Troubleshooting guide

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Failure
classification
by hardware devices and mechanical
Table 6-4
Failure
classification
by hardware devices and mechanical
4. Display
5. I/O devices
6. Storage
7. Mechanical
1.
Display anomalies
on page
109
2.
Dead pixel
on page
112
3.
No video (internal)
on page
112
d
4.
No video (external)
on page
113
d
5.
DisplayPort/VGA
on page
113
6.
HDMI
on page
113
7.
No or bad external video
via docking
on page
114
8.
Incorrect or missing color/
distorted image
on page
114
9.
Touch screen
on page
115
1.
Keyboard
on page
116
2.
Keyboard point stick
on page
117
3.
Keyboard backlight
on page
117
4.
TouchPad
on page
118
5.
Network Connectivity
Ethernet (RJ-45 jack)
on page
118
6.
Network connectivity
wireless (WLAN)
on page
119
7.
USB
on page
120
8.
Smart card reader
on page
121
9.
Speaker, headphone -
audio issues
on page
122
10.
Thunderbolt (TB)
on page
123
1.
Hard drive/solid-state
drive not recognized
on page
125
2.
No boot to operating
system (no read/write
error)
on page
125
3.
Read-write error
on page
126
4.
Slow performance
on page
108
c
5.
Blue screen (BSOD) error
on page
126
b
6.
Noisy hard drive
on page
127
1.
Fan error message - 90B
on page
128
2.
Noise (sound)
on page
129
3.
Fan runs constantly
on page
130
4.
HP Thermal Monitor
on page
83
5.
Stuck power button
on page
131
b,c,d
similar symptoms
2. Examine the environment
It is important to examine the computer’s environment. If you can quickly identify the cause of the issue,
fewer resolution steps may be needed. Perform the following environment inspections:
●
Check all cables and connections to be sure that there are no loose connections.
●
Confirm
that power sources are good, such as wall power type/adapter (110V/220V ac), power strip. Test
with a
verified
working AC outlet.
●
Check for compatibility issues between the computer and third-party devices, peripherals,
noncertified
devices, incompatible hardware (i.e., Mac OS device). Incompatibility can result in blue screen errors,
improper operation, and so on.
●
Isolate the computer from sources of electromagnetic interference (EMI), such as cell phones, 2-way
radios,
floor
mats, fans (and other electronic motors). EMI may contribute to a display freeze issue or
lock-up.
78
Chapter 6
Troubleshooting guide