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 112
2.
Dead pixel on page 114
3.
No video (internal)
on page 114
d
4.
No video (external)
on page 115
d
5.
DisplayPort/VGA
on page 115
6.
HDMI on page 115
7.
No or bad external video
via docking on page 116
8.
Incorrect or missing color/
distorted image
on page 116
9.
Touch screen
on page 117
1.
Keyboard on page 118
2.
Keyboard point stick
on page 119
3.
Keyboard backlight
on page 119
4.
TouchPad on page 120
5.
Network Connectivity
Ethernet (RJ-45 jack)
on page 120
6.
Network connectivity
wireless (WLAN)
on page 121
7.
WWAN on page 122
8.
USB on page 123
9.
Smart card reader
on page 124
10. Speaker, headphone -
audio issues on page 125
11. Thunderbolt (TB)
on page 126
1.
Hard drive/solid-state
drive not recognized
on page 128
2.
No boot to operating
system (no read/write
error) on page 128
3.
Read-write error
on page 129
4.
Slow performance
on page 110
c
5.
Blue screen (BSOD) error
on page 129
b
6.
Noisy hard drive
on page 130
1.
Fan error message - 90B
on page 131
2.
Noise (sound)
on page 132
3.
Fan runs constantly
on page 133
4.
HP Thermal Monitor
on page 84
5.
Stuck power button
on page 134
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
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