Examine The Environment - HP ZBook 15v G5 Maintenance And Service Manual

Failure classification by hardware devices and mechanical
Table 7-5 Failure classification by hardware devices and mechanical
4. Display
1. Display anomalies
on page 110
2. Dead pixel on page 113
3. No video (internal)
on page 113
4. No video (external)
on page 114
5. DisplayPort/VGA
on page 114
6. HDMI on page 114
7. No or bad external video
via docking on page 115
8. Incorrect or missing color/
distorted image
on page 115
9. Touch screen
on page 116
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.
5. I/O devices
1. Keyboard on page 117
2. Keyboard pointing stick
on page 118
3. Keyboard backlight
on page 118
d
4. TouchPad on page 119
d
5. Network Connectivity
Ethernet (RJ-45 jack)
on page 119
6. Network connectivity
wireless (WLAN)
on page 120
7. USB on page 121
8. Smart card reader
on page 122
9. Speaker and headphone
audio issues on page 123
10. Thunderbolt (TB)
on page 124
6. Storage
1. Hard drive/solid-state
drive not recognized
on page 126
2. No boot to operating
system (no read/write
error) on page 126
3. Read-write error
on page 127
4. Slow performance
on page 109 c
5. Blue screen (BSOD) error
on page 127 b
6. Noisy hard drive
on page 128
General troubleshooting steps
7. Mechanical
1. Fan error message - 90B
on page 129
2. Noise (sound)
on page 130
3. Fan runs constantly
on page 131
4. HP Thermal Monitor
on page 84
5. Stuck power button
on page 132
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