HP ZBook 17 Maintenance and Service Guide - Page 107

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

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Failure classification by hardware devices and mechanical Table 7-4 Failure classification by hardware devices and mechanical 4. Display 5. I/O devices 6. Storage 7. Mechanical 1. Display anomalies on page 126 2. Dead pixel on page 128 3. No video (internal) on page 128d 1. Keyboard on page 132 2. Keyboard point stick on page 133 3. Keyboard backlight on page 133 1. Hard drive/solid-state drive not recognized on page 142 2. No boot to operating system (no read/write error) on page 142 4. No video (external) on page 129d 5. DisplayPort/VGA on page 129 4. TouchPad on page 134 5. Network Connectivity Ethernet (RJ-45 jack) on page 134 3. Read-write error on page 143 4. Slow performance on page 124c 6. HDMI on page 129 6. Network connectivity 7. No or bad external video via docking on page 130 wireless (WLAN) on page 135 7. WWAN on page 136 8. Incorrect or missing color/ 5. Blue screen (BSOD) error on page 143b 6. Noisy hard drive on page 144 distorted image 8. USB on page 137 on page 130 9. Smart card reader 9. Touch screen on page 138 on page 131 10. Speaker, headphone - audio issues on page 139 11. Thunderbolt (TB) on page 140 1. Fan error message - 90B on page 145 2. Noise (sound) on page 146 3. Fan runs constantly on page 147 4. HP Thermal Monitor on page 98 5. Stuck power button on page 148 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. General troubleshooting steps 93

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Failure
classification
by hardware devices and mechanical
Table 7-4
Failure
classification
by hardware devices and mechanical
4. Display
5. I/O devices
6. Storage
7. Mechanical
1.
Display anomalies
on page
126
2.
Dead pixel
on page
128
3.
No video (internal)
on page
128
d
4.
No video (external)
on page
129
d
5.
DisplayPort/VGA
on page
129
6.
HDMI
on page
129
7.
No or bad external video
via docking
on page
130
8.
Incorrect or missing color/
distorted image
on page
130
9.
Touch screen
on page
131
1.
Keyboard
on page
132
2.
Keyboard point stick
on page
133
3.
Keyboard backlight
on page
133
4.
TouchPad
on page
134
5.
Network Connectivity
Ethernet (RJ-45 jack)
on page
134
6.
Network connectivity
wireless (WLAN)
on page
135
7.
WWAN
on page
136
8.
USB
on page
137
9.
Smart card reader
on page
138
10.
Speaker, headphone -
audio issues
on page
139
11.
Thunderbolt (TB)
on page
140
1.
Hard drive/solid-state
drive not recognized
on page
142
2.
No boot to operating
system (no read/write
error)
on page
142
3.
Read-write error
on page
143
4.
Slow performance
on page
124
c
5.
Blue screen (BSOD) error
on page
143
b
6.
Noisy hard drive
on page
144
1.
Fan error message - 90B
on page
145
2.
Noise (sound)
on page
146
3.
Fan runs constantly
on page
147
4.
HP Thermal Monitor
on page
98
5.
Stuck power button
on page
148
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.
General troubleshooting steps
93