HP ZBook Fury 17 G7, Руководство по техническому обслуживанию и ремонту, Страница: 120 / 232

Table 7-5 Failure classification by hardware devices
4. Display 5. I/O devices 6. Storage 7. Mechanical
1. Display anomalies
on page 143
2. Dead pixel on page 145
3. No video (internal)
on page 145
d
4. No video (external)
on page 145
d
5. DisplayPort/VGA
on page 146
6. HDMI on page 146
7. No or bad external video
via docking on page 147
8. Incorrect or missing color/
distorted image
on page 147
9. Touch screen on page 148
1. Keyboard on page 150
2. Keyboard pointing stick
on page 151
3. Keyboard backlight
on page 151
4. Touchpad on page 152
5. Network connectivity
(RJ-45 jack) on page 152
6. Network connectivity
wireless (WLAN)
on page 153
7. WWAN on page 153
8. USB on page 154
9. Smart card reader
on page 155
10. Speaker, headphone -
audio issues on page 156
11. Thunderbolt (TB)
on page 157
1. Hard drive or solid-state
drive not recognized
on page 159
2. No boot to operating
system (no read-write
error) on page 160
3. Read-write error
on page 161
4. Slow performance
on page 162
c
5. Blue screen (BSOD) error
on page 162
b
6. Noisy hard drive
on page 162
1. Noise (sound) on page 164
2. Fan runs constantly
on page 164
3. Thermal shutdown (hot)
on page 166
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 might be needed. Perform the following environment inspections:
●
Check all cables and connections to be sure that no connections are loose.
●
Confirm that power sources are good, such as AC outlet or adapter (110 V/220 V ac), power strip. Test with
a verified working AC outlet.
● Check for compatibility issues between the computer and third-party devices, peripherals, uncertified
devices, incompatible hardware (for instance, 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, two-way
radios, floor mats, fans (and other electronic motors). EMI may contribute to a display freeze issue or lock-
up.
3. Perform a visual inspection of hardware
Perform a physical inspection of the computer.
●
Look for abnormalities such as a cracked display, dented battery, broken latches for battery bay, keyboard
key caps popped out, dust over connectors, liquid spill over keyboard.
● Look for signs of drop, movement, or vibration that may cause internal and external loose connections.
106 Chapter 7 Troubleshooting guide ENWW